Many jobs require their employees to be on deck at irregular or unscheduled times, which can get a little hairy if they're not being paid for it. Many bosses know that this isn't exactly fair so they'll cut their employees some slack here and there when they know the schedule is weird. This manager didn't, so he got hit with the classic, much like this other employee who derailed their incompetent boss by working their scheduled hours.

Tumblr story of game warden who let poachers reel him in in scuba gear to catch them | Terry Grosz fish and game warden caught illegal fishers by waiting Eel river wetsuit and reeled himself fisherman cast out their lines. After writing citations and confiscating their fishing rods, he went back into river and swam away. Ultrafacts.tumblr.com