Here is an excerpt from the below video, which I think should really be left to speak for itself:
Michael Cera: "Everyone else would be terrified of us."
Jack Black: "They'd be terrified of us... but... they would also just kill us. Right away."
"Year One" stars Jack Black and Michael Cera. Two funny guys. Dead at the hands of neanderthals, sure. But that's only because they wouldn't understand the jokes. Head over to MTV.com to catch the rest of MTV Rough Cut: Jack Black and Michael Cera.