A Forest Cottage

Roy ran up to the cottage, pleased to finally have escaped the nightmarish doldrums of the misty woods. Of course, he wasn't out of the woods yet, but this was at least an improvement. As he approached, though, he spotted the single candle and stopped. Who lived here? What if it was a witch? Forest witches could be awfully mean...but maybe he'd be able to trade the glowing mushrooms for some help. Taking a deep breath, he knocked on the door. Why not? It was the only chance he had of getting out of here.

As Gareth approached, a plain black cat could be heard slowly stalking upon the roof of the cottage. Quietly, it stared at the two newcomers, its cat eyes then locking unwavering upon Roy as it walked up to the edge, gazing downward at him.
After a few seconds, where Roy would not be greeted with a response, the feline would disappear over the other side of the roof again. A light thud confirmed that the nimble thing had just found a way back down on the other side of the structure.

The smell of baking pumpkin bread emanated from the door, and a soft light glowed from the blurry windows. The night air was chilly, and the locked cottage seemed more inviting now than ever.

"Hisss! Hisss! Pssst!" Gareth made strange noises, trying to scare the cat away. After the feline vanished he turned to Roy, "just-just-just push it open, my friend Roy-Roy. Who knows, maybe they have pumpin-punkin-pumpkin bread-pie?" Gareth stammered and stuttered as he shoved the cottage door open without hesitation.

Roy hesitated, then followed the odd stuttering man into the house. Hopefully he'd be able to prevent the poor soul from getting into any trouble. Once inside, he glanced around and peeked into the cauldron. What sort of place was this? All the potion ingredients worried him. Witches made potions, and they lived in the woods...what if he'd wandered into a witch house? Would he be kidnapped? Was it really kidnapping if he wandered in on his own? At least the pumpkin bread smelled good, and looked awfully fresh...but what sort of person went around barging into houses and eating people's food? It was like that one children's story with the girl with the golden hair, where three bears broke into her house and devoured her whole family. Eating the bread would be awfully rude, and so he resisted the urge. The low ceiling didn't bother Roy all too much, as he'd never been very tall to begin with.

Gareth would find the pumpkin bread was delicious enough, and he'd be able to help himself to a few ingredients before something happened.
First, visible around his right palm as he reached for one of the bottles, a translucent glyph of light purple flashed and spun around his hand like a two second light show. Gareth would then experience something very strange.
His perception would begin to change, growing incredibly blurry at first. In this state, which lasted only a few seconds, his ability to maintain balance would become threatened... though with some determination, he could remain standing upright.
Then came the truly odd, which washed over him like a state of delerium. Gareth's vision, while returning some measure of clarity over a few moments, would be completely upside down. Even standing upright, the ceiling would appear to be where the floor was and vice versa, such that only actually tilting his head and looking at Roy upside down would things appear to be normal. Needless to say, bodily coordination would soon reveal itself to be a disaster. He'd begin to feel unusually warm as well, as though stricken with a slight fever, the sensation slowly begging him to step outside and into the cold air... if he could navigate his world properly at all.
The cabin door swung shut on its own accord. Gareth would probably be desparate to get out, but all Roy could perceive was the strange runic glow and the latching sound of the front door...

Gareth moaned and groaned, struggling to keep his balance. He fell flat on his back in a daze and fought a losing battle to get back up. Up was down and down was up, and all the former-wanderer could do was fall victim to the witchery.

"Help, Roy-Boy," he groaned, "find out what's wrong!"

Roy was suddenly very worried indeed. How had things gone so wrong? Gareth was lying on the ground, clearly in some sort of trouble...but Roy didn't even know what was wrong? Was he drunk? That was probably a very distinct possibility...but suddenly, Gareth was the least of his worries. The door was rattling, and it seemed as though there was a girl outside. Was she the owner of the house? He hurried over and pushed on the door, trying to force it open.

"Hello! There's something wrong with the other guy here...I tried to stop him! I didn't want him to take anything!"

At first, the door resisted Roy's push, but a little effort and the latch would seem to break off, accidentally becoming dislodged from the wood and sending the door flying open.
Roy, pushing his weight on the door, would probably go tumbling out the exit.

And his weight would throw him, from the cottage... and into a cavernous tunnel. The tunnel of rock worked something like an uncomfortable slide, and he'd have perhaps one last look behind him as maybe he tried to save his footing before falling. He'd see the door open, the inside of the cabin... but the great outdoors seemed to have vanished. The warm interior of the cabin would fall out of view as Roy fell, sliding down the slick but bumpy tube of rock that further descended into a cavernous tunnel. From here, the fear of being trapped would surely set in as he realized what was going on.
Gareth's vision would slowly begin to return, only to reveal to him the two options he had: stay in the cabin, or make the descent after Roy, sliding down the rocky tunnel's descent after stepping out the exit...

Gareth shook, quivered, and mumbled until the effects wore off, ultimately pulling himself up and frantically looking around for Roy. "Roy-boy! Roy-boy, wh-where are you!?"

The peculiar Gareth observed the open door nearby and quickly assumed Roy must have went through there - or rather down there. "Roy! Roy-boy you down there!?" Gareth called down the tunnel. "Hold on, here I come!"

Without hesitation the mind-warped Gareth attempted to slide down into the tunnel. He promptly lost his footing and grip and tumbled down as Roy did, no doubt coming close to landing on top of him.