The Man of Steel, Faster than a Speeding Bullet, X-Ray vision, super strength, able to leap tall buildings in a single bound. Is it a bird? Is it a plane?
He’s every superhero from every comic book he’s ever read, all because of the crystal the Doctor gave him to hold, which he mistook for medicine and swallowed.
It wasn’t supposed to last; the Doctor said it would wear off once the crystal… passed through. Only it didn’t, he grew up, and the Ghost was born.
Helping people is great, really it is, but x-ray vision? It’s a mixed blessing.