You should have seen how defeated and confounded my DM was when it happened. Especially since I rolled before he could object, and I rolled high (I think it was an 18 or something, where he would've had trouble saying I failed something simple like rolling to punt a cat).
The whole table was in an uproar too, so he had no choice but to acquiesce. I swear I see that thousand-yard stare in his eyes every time the story comes up. XD