Post Malone is currently on his Runaway Tour. The show stopped in Detroit on Sunday night at Little Caesars Arena. The night before, Posty stopped by the MGM Grand for a little rest and relaxation. Maybe a little gambling. He happened to have swung by the Axis Lounge. Local favorites Collision Six just happened to be onstage. And then, this happened.

We're pretty sure Michael Scott Taylor was kidding. And we're pretty happy he shared this via Facebook. Enjoy Posty singing a little Sublime Saturday night. Purely impromptu.