Funny joke, but over-long build-up.
I did really chuckle at the ending, but whilst this as well was more interesting that 'a musical view' - thanks to the shifting eyes of the guy in front, and the fact I could understand most of what foamy said - the build-up to the joke did seem a bit more drawn out.
I suppose maybe for some fans the voice alone will be humour enough, but I just feel it could have been better had you cut a few lines.