"Even an expert in pullups won't do it well, because of the complexity of the movement," says Men's Health fitness director Ebenezer Samuel, C.S.C.S. of the 'Bring Sally Up' challenge.

The rules to the challenge are simple: put on the song 'Flower' by Moby, drop to the floor, and perform a series of pushups while following along with the lyrics "Green Sally up / and green Sally ...