I don't know how familiar you are with wrestling. Yeah, the choreographed stuff they show on TV. But wait! Come back. Even if you despise it, watch this anyway. It's an old clip so the video quality is super-sketchy but it's clear enough for you to see what's going down.
As you may or may not know, hitting people with folding chairs is a pretty common practice in pro wrestling. Everyone loves to see it. So when someone asks the audience for a chair to deliver a beat-down... That's what he got.