I have used this exact joke as a test of people's sense of humor; the people I thought most similar to me in sensibility loved it; many other people don't get it.

I never heard the part "and, this is the bit where I kinda fucked up", so I guess I was telling it wrong, but it still got laughs from the sort of people who laugh at that sort of thing.

As for me? I think it's hilarious.