The skinny geeky kid paused sipping. He really felt weird. And kind of cold around his midsection too, and then he looked down and realized this was because his abdomen was exposed, his shirt now too short to contain his elongated torse. Next he felt a pain in his feet until his feet popped out of the heels of his shoes and continued getting longer, and his pants were incredibly more flood-like, his calves extending from them. But the biggest change was his arms--his usually incredibly monkey-like arms were even longer than they were before, even in proportion to his new height, and dangled somewhere just past his knees.
He stood there, staring at the half-drunk shake, then at himself. "I'm a freak!" he whined. "I thought you said this would make me stronger!"
The clerk looked up at him. "You should fill out eventually, but how many guys do you think are going to pick on someone seven feet tall, no matter how skinny?"
The geek cocked his head, and looked at the rest of his shake. How many indeed....