5a) In Which More Cowbell is Needed...

4a1) SNL - More Cowbell

4a2a) ...and in which Will Farrell gives one of his great unhinged performances, Jimmy Fallon cracks up halfway through, Horatio Sanz gives his "I'm just lucky to be here" performance, and Cristopher Walken tries to keep the whole thing going.

4a2b) Which is all to say the skit itself is not that good. The concept is hilarious, especially to classic rock fans (see next item), but what saves it is that no one can really hold it together once things really get going. SNL often operates more on charm than actual comedic chops, and this is a prime example. One that never gets old. 

4a2c) And like a true music geek, I have to point out that Bruce Dickinson's (he, the lead singer of Iron Maiden, and fencer of Olympic medalists), first production credit was in 1984, nearly ten years after Blue Öyster Cult's "(Don't Fear) The Reaper" was released. Arguably putting them in the influence seat, not the other way around. But then, you knew that. And so did whomever wrote the script.