When I worked at a computer repair shop, I had to call Microsoft all the time for product activation, which was fairly routine. However, everyone would crowd around me to see what I had to say. If I wasn't feeling particularly creative, I'd just see if I could top my previous record of 'cactus' (I think it sat near 40 for a 3-5 minute call), but other times I created plenty of characters (a gay one, a Borat imitation, a vehemently racist Indian (he hated Pakis), etc.) and just got my representatives to say ridiculous things while asking to marry them, what the weather and women were like in India, how much sex they got weekly, etc. It was pretty fun, but I lost my suction mic for my microcassette recorder so I could never record them.