You'd think all that time hanging out with actors on the Big Bang Theory would sharpen your improv and recovery skills to a deadly level but not so much in the case of Kaley Cuoco.

'5 Second Rule' for those who are unaware, basically challenges you to name three things in a given category in five seconds and sounds easy but the reality, as Kaley displayed with Ellen, is far from easy. Especially when your mind goes to a filthy place straight off the bat and you're on national television.

In her defense, Ellen bombed a bit also and she did make a bit of a comeback although it was clear who the winner was going to be from the outset.

Via ellentube