This is an interesting perspective...

 I regularly stream on Twitch (username improbablegarage if you care), mostly me customizing diecast cars, but sometimes other stuff. Last night i streamed while making dollhouse furniture for a partner's daughter. 
At one point while cutting a board i didn't keep control of one piece and the table saw kicked it back. It hit me in the gut. Hard. 
At the time I realized people watching might not know what happened, so went into narration mode quickly. It was a bit scary but mostly annoying that I'd done something dumb. 
When i uploaded it to youtube i watched that bit. And i got at least as big an adrenalin response from watching it as from the actual experience. There is something about watching myself get injured that has me thinking how much worse it could have been. That both my partners were watching via twitch, but would have been largely helpless if something truely bad had happened is also messing with me. I dunno, this may end up sticking with me after the bruise heals.

This is the video, injury is at 29:10.
youtu.be/SjBlULR-gGs