Presidential politics is serious stuff, and when you're talking about the GOP nomination race and the prospect of one of those guys getting the keys to the White House, it can be downright scary. So, let's be thankful the contest has provided plenty of inadvertent comic relief along the way. From Rick Perry's brain freeze ("oops!") to Mitt Romney's $10,000 bet, to Michele Bachmann's likening herself (all unawares) to a serial killer known as "the killer clown," the Republican field has delivered on the gaffe front. Click through to relive 9 of the most memorable screwups to date. (Obviously, let us know what we're missing.) And check back for the inevitable updates.