During rehearsal for Monday Night Raw at the US Bank Arena, there was a minor fire involving the pyrotechnics. They Arena had just opened so the fans that had made it in had to be evacuated. They were eventually let in half hour before the show started.

here is a photo:

Here is a link to Fox News 19:

http://www.fox19.com/story/19150988/fire-ignites-at-wwe-raw-supershow-at-us-bank-arena?autoStart=true&topVideoCatNo=default&clipId=7560535