Just a funny kind of morning so it needs a funny kind of song. Aside from being very funny, it's a pretty great song, right out of that 70s metal time, think Blue Oyster Cult or perhaps Deep Purple as analogies. Except this is supposed to be funny.
If Spinal Tap had been done now I'm sure the viral stuff might be quite funny, with various posts about the mishaps that happened to the band along their tour. Wouldn't be the same though.