I like it! Reminds me of Rodney McKay a little.
I love when they react this way because they’re normally invulnerable and a minor injury like this is something they’re not used to.
Maybe it’s literally the first time they’ve felt pain (ever or since getting their powers).
Maybe they didn’t realize that they’d suddenly become vulnerable until unexpectedly being hurt.
Maybe they’ve been an ass because they know that they can get away with it, but now suddenly they need help from the same people they’ve pissed off. (Like Q from Star Trek.)