Most dyno rooms we’ve seen have guard rails separating the car on the dyno from the spectator area. This dyno room in Serbia was very tight with quite a few people standing around during a dyno run. Towards the end of the run a man walked by the car while shaking hands with someone. He accidentally stepped on the dyno roller while it was still spinning, resulting in a horrible faceplant into the floor. Careful out there while on the dyno! Video below from Streetfire.net: