Peter is terrified of spiders. Everyone thinks because of his name and all that he'd be cool with them. No. They terrify the shit out of him.
Tony: *Walks in the kitchen to see Peter on the ceiling.* Kid what are you?
Peter: SHUSH! There's a spider. Can you kill it.
Tony: Why would I.. Wait. You're scared of spiders. But how.
Peter: Look the bite was a very traumatic thing to experience. Now if you could. WAIT. MR. STEAK STOP WALKING AWAY!