Re: Oh $#!t moments...
I kicked a guy square in the balls yesterday while trying to footsweep him from the knees. I went for it and just kicked him right in the nuts. It was a 'oh crap i'm so sorry!' moment.
Then I told him "Next time, you know not to try that open guard crap with me!" and threatened to gouge his eyes out.
PS - that last part didn't happen.