I just discovered a new (to me, at least) little feature in Smash Bros. Melee: if you go into the sound test and select a level BGM to play, then go into the trophy gallery, that music will be playing.
Isn't it amusing how many pointlessly random little details like that are in the game? From the myriad hidden features, and things like fighting Giga Bowser, or the metal Bros. as opposed to just metal Mario, to being able to tilt the screen with the c-stick and use alternate musics for many levels, to the entire concept of the trophies, the sheer number of them, detail of the description and the fact that one will occasionally seem to earn one out of the blue...
Just the fact that they bothered to put all of this stuff in is simply grand. I wonder what else there is that I've yet to find...
Go Moon!