… was last weekend, when I and one of my flatmates (who’s a linguistics student) spent a quarter of an hour having fun with the IPA map in general, and the voiced bilabial trill in particular.

But hey, the voiced bilabial trill really is one of the funniest phonems in the world. Alright, the “schwa” and the unvoiced glottal plosive are pretty fun, too, but no one can seriously believe them to be cooler than the voiced bilabial trill.