There was a sudden tearing sound as the room grew even smaller and Adam's clothes burst to shreds around him. He stared with a mix of terror and curiosity as he saw his nose extending into a long pink trunk has he pitched forward to the floor, hands and feet losing definition as they became thick and cylindrical to support his growing weight.
This was just ridiculous. A year of these experiments and nothing, now suddenly the slightest passing thought did this!? He took a deep breath, annoyed with the trumpeting sound that resulted. He just needed to focus, right? Something simple should do it. He couldn't keep being a big pink elephant because... the room! Yeah, he was going to sit back down in that chair again, and rest his hands on the desk while he waited for Dr. Yorva. Plain old ordinary human hands.
Adam closed his eyes again, nervously hoping this would work and thinking about rapping his fingers against the desk. Opening one eye in apprehension, he let out a sigh of relief to see he was no longer towering over everything, and had proper fingers again. He stood up, found his chair, and sat down, somewhat annoyed by the sudden cold as his clothes were still a pile of shreds on the floor, but at least he was human again.