There's a little one I learned many years ago in Portland, which was apparently making the rounds of the SCA folks. Presumably one can substitute other scurrilous groups for "Dwarves". If I get the time (ha-ha-ha-ha!) I'll make a NWC and MIDI file for the tune. As with most catches, the key is in the rests.

Hey ho! cried the merry Dwarves - -

It's off to war we - are -

To strike our foes both blind and - - dumb

Aloha,
Mark