"There's probably an experiment in there. Faster than the speed of sound— something like it."

Honestly Bruce would be more impressed if Peter could travel faster than the speed of light, especially when some theories claim that's the key to time travel. But that's definitely not something he's about to pitch to Peter, just in case his recklessness might lead him to thinking that would be an excellent idea.

"Wouldn't put too much faith in that, if I were you," he chuckles, though, evidently not mad. "So how did you like Harry Potter, by the way?"