When i saw FM: Episode 39, i thought that the security guard getting killed was too much out of nowhere, add that to "the list" Freeman mentions in some of the early episodes and i figured out Freeman and that guard should have some kind of backstory. Then i recalled watching the video posted here, and thought "what if that guard was the guard of episode 39?".
A few reasons people who dont watch Freeman's Mind could have to find that video funny was the possible heroic ideal some people had about Freeman, and then finding out he could be such a douchebag. That and the undeniable creative use of random sections of Barney's dialogue.
Questions?