You may be aware that I've recently begun prank calling 419 scammers who send me spam.
The other night, for a phone call to a scammer in the Benin Republic, I decided to whip out my impression of K-9, the faithful robot dog from Doctor Who and associated spinoffs.
It went pretty well; I've done lots of improv as the character (usually in the context of fic-writing and RPG campaigns) and my vocal impression ranges from passable with accent fail to surprisingly good actually. So K-9 was pretty true to K-9, and the scammer was appropriately confused.
However, I did not expect the call to go on for 45 freaking minutes. By the end I was just trying anything to get him to hang up on me without breaking character. It turns out that scammers are remarkably like customer service people; they really, really don't want to hang up on you for anything, even when they're bitching you out for daring to call them a scammer, and then repeating their scam pitch yet again.
I debated putting this call online since it's such a monster, but Nicky convinced me with her debating powers. So, if you're so inclined and you've a clear schedule, you can check it out here. (45 MB mp3) You can hear more and more mute spots in my side of the convo as the call goes on; that's where I had to click off my mic and laugh my head off until I collapsed into coughing fits.