Potassium

The potassium person thing was a test subject for a science experiment so they put him in a container and injected him with the substance. after he felt normal but when he went outside, his skin starting to grow gray, his head grew bumps, and lines of metal spinning around him. He went back inside in a rush and told the scientist what happened. So basically he was injected with too much potassium...oops. now he walks in a bubble the whole day. and when his bubble does break, the metal lines protect him from sharp pointy objects even though it hurts. yea, oof