You might have seen this already, but it's way too good not to share.
OK Go made a name for themselves a few years ago with their brilliantly inventive music for their smash-hit Here It Goes Again.
In a nutshell, it basically involved treadmills and lots of synchronised jumping and running. It was a viral hit.
Here's a little reminder.
A group of students went out and made their own version of the classic video, complete with treadmills and synchronised running.
The amount of coordination and timing that goes into this is insane.
Take a look!