[ luckily, the hulk in not your brother, leo, but peter doesn't know the exact height of him. he just knows he's... big. never needed to look into it past that. ]

Yeah, the Hulk. [ a pause, as he tries to think of how to explain it. ] He's like... y'know, around... here? [ he says this as he puts his hand up as far in the air as it can go. ] Maybe? [ not sure if this is the most accurate way to do this.

but. ] —Wait, sorry, does this mean you haven't even seen him before?