Just a very quick one:
Int. Day. Busy, posh hotel lobby.
Lots of guests are going about their business. There's a discreet buzz track, then the 'ding' of one of the lifts. Doors open, and out steps a guest who's soaking wet and wearing nothing but a towel.
GUEST: Who used all the f**king hot water?
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I like this. I'd drop the expression "buzz track" though, it makes me think a giant fly is going to step out of the lift. I think the phrase you're looking for is "wild track", but there's no need to include it. The first sentence is enough to let us know how the scene will sound.
Good point, David. Cheers! 