During the Grammy awards last night, Taylor Swift took several perfectly normal pictures with other celebrities backstage. But wait–who's that guy in the background?

An old prospector lost on his way to the nineteenth century? Igor's bearded brother polishing his photobombing skills? Just some bearded dude trying to get out of the way of this Very Important Picture? Whoever he is, he will doubtless go down in history as one of the enduring mysteries of the Grammys.

Update 4:36 p.m. The mystery of the time-traveling prospector may have been solved! He's reportedly a sound engineer for the rock band Queens of the Stone Age.

[image via @CBS/Twitter]