The 1956 science fiction movie Invasion of the Bodysnatchers is about a small California town where aliens have descended and grown identical versions of people from the town, in essence snatching their bodies. On this killer In Rainbows track, Thom Yorks seems to suspect something similar is happening to someone around him. "I have no idea what you are talking about," he sings. "Your mouth moves only with someone’s hand up your ass." The song became a hit on modern rock radio and has been in regular rotation in their live shows ever since.