Hold music... I once was forced to listen to noisy low quality overmodulated hold music for an extended period of time. This made me wish for three meteorites to annihilate the company, the call center, and the guy who composed the hold music. The longer the expected holding times are, the higher quality and more varied the hold music should be.
Well...not really.
Scientist 2: "Oh, crap!"
Scientist 1: "Exactly."