Yes it is true bassist, Pete Wentz, has been waddling around stage the past few days.

Wentz posted on Fall Out Boy's website that he injured his back doing a "stunt" in the making of their video "This Ain't a Scene, Its An Arms Race."

The nature of this stunt is still a mystery. The band has been tight lipped about this video. All that we know is that they have taped in six different LA locations.

The way the band is keeping this video on the DL, were expecting the best video EVER!

Thanks for the suspense Fall Out Boy!