This is what I saw when I rounded the corner at work on my way to buy a soda from the machine. It's a CPR trainer preparing for his big finale. He excuses himself to go the bathroom, finds a dark corner, coats his arm in blood and puts fake shards of glass in the wound. Then, he wanders into the class, says he had an accident and pretends to pass out. He grades people on their reaction.
I am not in the class, but my reaction was to take a picture.
I probably failed.