Furry?

John shudders once, then twice, and drops to his knees. If he could get an outside perspective of this, he might really enjoy this.

His pinkish skin distorts, darkening until it's the blue of a midnight sky. It begins to harden, bulging and shifting as it reshapes from pores to scales, glinting in the artificial light of the house. As he moves, he heard his new scales click like a thousand tiny magnets moving as one. The feeling of these scales is at once itchy like you wouldn't believe, and deeply soothing. Like being wrapped in a cool blanket on a stinking hot day. Even more than that, John can feel the weight of these scales. In just seconds, he had added pounds of weight to his body without so much as an ounce of fat. The cool blanket became weighted, like a hug. He ran a claw along them, feeling it bounce off his arm without so much as a scratch-

Wait, claws?

John looked down at his hands, where his long, gentle fingers had been wrapped in those same deep blue scales. His fingernails where lengthening, becoming sharper, longer, and an ivory white to replace the pinkish colour they'd been a moment ago. He wasn't looking, but he could feel his toes doing the same, his new feet digging into the wooden floor underneath him. He could worry about all the scratches later.

It was around now that he felt something in his spine. He let out a cry of surprise as electricity blasted up and down his back. He arched and flexed, biting down to keep himself from yelling out. He dropped onto his side, the spasms flashing through his body. In this maelstrom of pins and needles across his entire torso, he didn't notice the pressure building in his pants. At least, until his jeans explode apart, revealing a gigantic alligator's tail that slammed into the opposite walls. John slid forwards with the sudden ****, bringing his hands up just in time to stop himself being brained by the skirting board.

Oh, but his spine wasn't done yet. The tail of his flexed straight out, and John couldn't hold his tongue as he suddenly had so much more spine to feel. He yelped as his body exploded in deafening static, his arms shuddering as he clutched the wall. His claws dug into the plaster, but he didn't care. His shirt had its buttons torn off and the fabric ripped to shreds as two bat wings blasted out of his back. One of the huge, leathery appendages pressed awkwardly against the floor, while the other touched the other side of the hallway.

John's breathing was ragged, and he felt his body calm to a quiet. He took several deep breaths, inhaling the smell of the wood beneath him and the mixture of metal and musk that emanated from his new scales. With shaky legs, he picked himself up, steadying himself against the wall. His claws had ripped a giant chunk of plaster apart in his spasms. He wondered how he was going to explain that to his mum, when he heard a scream echo through the house.