The members of Green Day love to make touring fun.

On Tuesday, the band shared a clip of a prank they played on Weezer during their combined “Hella Mega” tour.

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At the end of Weezer’s set, the members of Green Day crashed the stage, wearing strange costumes and giving the audience some big laughs.

While it was hard to tell in the video posted to Twitter which Green Day member was which, one was dressed as a speedo-wearing sea captain, while another was a horse.

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Fans took to Twitter, attempting to guess who was who.

The last show of the North American leg of the “Hella Mega” tour, which features Green Day, Weezer and Fall Out Boy, played to a crowd at Seattle’s T-Mobile Park on Monday.