Indie pop pranksters OK Go’s viral music videos have always been as memorable as their music-from the treadmill dance routines of “Here It Goes Again” (21 million You Tube views) to the ingeniously intricate Rude Goldberg contraptions of “This Too Shall Past” (43 millions views). It’s no surprise, then, that their newest song (“The Writing’s on the Wall”) comes with another mind-bending, hilarious video. The clip, which has already racked up over 6 million views in five days, features half-shaven beards, flying Silly Putty, and numerous optical illusions. Intrigued? Go behind the scenes with this video from CBS. Pre-order Hungry Ghosts, their latest (out October 14) now. Before then, listen to “The Writing’s on the Wall” and three other new songs on SoundCloud-for free. Oh and, for pure laughs, check out the band’s collaboration with The Muppets.