Re: Wierdest powers...
Grant Morrison's Marvel Boy (Noh-Varr) had some weird powers.
He was genetically engineered with insect DNA, which gave him a bunch of powers like being "triple jointed," allowing extreme feats of contortion and the ability to survive what would otherwise be crushing forces. He can also scale up walls like Spider-Man.
But the weirdest stuff he could do is when needed, he can digest any organic substance without adverse effects. As a result, he can eat rotting or poisonous food as well as non-food stuffs (e.g., cardboard, paper, etc.). He uses this ability to recover from wounds or extreme stress.
His body fluids contain nanotechnology that invades the minds of those whose skin it touches. This causes hallucinations' and allows Noh-Varr a degree of mind-control. So if he spits on you, or gets some blood on you, he could take control of you.
His thumb nail can grow into a deadly crystalline spike. He can insert this nail into an opponent and leave it to explode, killing both the target as well as causing extensive damage to the surrounding area.
Crazy powers, but he's a cool character.