During a Brother Ali show in Jackson Hole, Wyoming, a man walked on the stage and took the microphone to beat box. In a surprising twist that surprised many, including The Brother himself, that man turned out to be Justin Timberlake. It appears Timberlake was in Wyoming to watch the Ali show and felt the need to be a part of it.

Ali, unaware of who the guest was at first, took the microphone away from Timberlake and led him back to the crowd.

“Last night in Jackson Hole WY was fun. This dude jumped on stage and started beatboxing. Me being me, I snatched the mic from him and he got off stage. At the end of the song, [DJ BK-One] tells me that was Justin Timberlake,” Ali told fans through his Twitter page.

This surprised Ali enough to get Timberlake back on the stage for an impromptu freestyle session with the former Nsync singer doing the beatboxing.

“I ran and grabbed him and he beatboxed while I freestyled for about 15 minutes. Sorry JT. Thanks for rockin with us.”

A better quality of the video footage may be made available through Rhymesayers Entertainment, but below is the footage that was taken by a fan at the show.