And thus begins the MCU trend of people putting on a ballcap to disguise themselves.

Done well, such give and take is great for the game. Done poorly... well... it just makes things that much worse as there's no dice acting as an arbitrator.

If it helps, you could refer to it as a "Check". Me being me, I'm taking that term from GURPS... I think. I dunno. I thought it was pretty common in most RPGs, so for all I know, I got it somewhere else and GURPS doesn't even use it, either. XD

I really like how you're portraying the Hulk transformation in terms of game Mechanics. Any dangerous situation in a ttrpg would almost guarantee that the circumstance bonus would steadily increase until the transformation becomes an inevitability. I wonder if the mutant form has any hidden downsides that our player missed in his initial skimming of the character sheet?