If I get an undertaker with a sense of humour, I'm going to ask to have my coffin rigged with rockets. Then, at the ending of the funeral, this will play:
<youtube=9vpMy14XiBw>
Then, the coffin-trolly will roll out of the building, rise and launch the rocket-coffin. Fetzeeeeeeeoow! Hopefully landing on someone's ugly garden gnomes. Or if that's not possible, at least roll the coffin inside the incinderator while the tune plays.
For the nuclear holocaust, I'll climb up on the roof and play:
<youtube=0fft-n0i4CM>
While admiring the towering cloud above. Possibly getting the tan of the century.