Sonic the hedgehog was laying on his bed, bored out of his mind as he listened to the rain gently patter against the house. It had been a few weeks since he last fought his old nemesis, Doctor Eggman. Without him being up to his usual schemes, there wasn't much for him to do. Sighing, he got up out of bed and headed to the kitchen to fix himself something to eat.
He poured himself a glass of soda, and looked into the fridge to pull out some hotdogs, only to find there were none to be had. Frowning, he closed the fridge and opted to make himself a simple sandwich instead. A sudden, unexpected loud clap of thunder made him jump, causing the glass to slip from his hand and crash onto the floor. Cursing himself, he went to fetch the broom and dust pan to clean the shards of glass up. He barely took two steps however when he noticed the chaos emerald just sitting there on the table.
Picking it up, he remembered that the emeralds are supposed to be able to transform thoughts into reality. Shrugging, he closed his eyes and concentrated, thinking about the glass he just broke repairing itself. When he opened his eyes, he found that the glass had done just that. "Huh, neat." He said, smiling. He then wondered, absentmindedly, if the emerald could create a chili dog for him. Just a few seconds later, the smell of his favorite food in the whole world told him it worked. He quickly gobbled it down, wondering why the hell he hadn't tried this sooner.
Soon, another, much darker desire took hold. He was kinda scared to try it though since he wasn't even sure if it would work. He held the emerald close, and once more closed his eyes and thought about his desire. Unsure if it worked, he made his way to the basement. He barely got halfway down the old creaky steps when he saw it. Right there in the middle of the room was a guillotine.
He retreated back upstairs to his room and retrieved a video camera and a tripod, then returned quickly to the basement and set the camera up, pointing it at the side so it'd get a good view of everything. He then held the emerald and thought to himself "When I die from being decapitated by the guillotine, bring me back to life in my bed." His cock throbbed at the prospect of fulfulling one of his darkest sexual fantasies. By the time he had the camera recording and placed his neck into the lunette underneath that sharp blade, his dick felt like it was gonna explode.
He reached up to the release handle with his right hand and gripped his pulsing cock with his left. The sudden sensation of his fingers wrapping around his arousal cause him to flinch and he almost pulled the lever. He was nervous, unsure if this crazy plan would even work. Sure it worked earlier with the glass and his food, but this was a touch more complicated.
"Fuck it." he thought to himself, if it worked, then cool. If not, well then it's not like he'll know about it. He began to stroke himself hard and fast. A little too hard and fast it would seem, as it wasn't even a full minute before he came hard. He screamed in pleasure and pulled the lever as his cock spurted. The blade fell with a single solid thud, beheading Sonic, his head falling into the basket. "Damn, would've loved to watch my body thrash around." He mused silently to himself before darkness claimed his senses.
And then, he opened his eyes, finding himself in his bed again. "Maybe the whole thing was just a dream. A really fucked up dream." He told himself. Yawning, he got up and went back down to the basement. His eyes widened when he got halfway down the stairs and saw all the blood. Did that really happen? He snatched up the camera and brought it to his computer. Inserting the memory card, he watched the video that was recorded on it. 
It really did happen! There he was, on video, locking himself in the guillotine. His heart race as he watched himself masturbate. The biggest shock of all was what happened when he pulled the lever. The blade fell and decapitated him like he remembered, but the part he wasn't able to see while his head was in the basket was his headless corpse actually leaping up, his hands flying to his neck as his dick continued shooting off semen. His body stumbled around before falling to its knees, his hands slowly clawing at the empty space where his head used to be, the blood continuing to spurt from his neck. That meaty cock of his was still firm as can be, completely ignoring the rapid loss of blood as it still continued shooting off seed. Then, after finally falling over on its back, his body vanished. The last few minutes of the video showed him coming back down and shutting off the camera.
Stunned, and once again aroused, a smiled formed on his lips. He was gonna have to somehow talk his friends into trying this crazy as fuck game of his.