Umphrey’s McGee played a rocking set on Halloween at the Riverside Theater in Milwaukee complete with bustouts, witty Game of Thrones costumes and creative mashups of everything from Marvin Gaye to The Weeknd. Check out these hilarious GIFs of Umphrey’s Mcgee’s fans and all of their out-of-the-box costumes from the L4LM photobooth, and tag yourself and your friends in our Facebook gallery.

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