io9 presents When Humans Punch Aliens: The Video Remix:
Sure, we come in peace and all that. But sometimes, when we encounter alien life forms, the only way we can communicate is by using our built-in universal translators: the ones with five knuckles and a thumb. Here’s our compilation of the greatest scenes from movies and TV where a human socks an alien. (To the tune of Mama Said Knock You Out by LL Cool J.)