Here's one by Billy Connolly from "Raw Meat for the Balcony"

As far as I remember it goes something like this....
There was a highland division in the trenches in WW1. They hadn't been in action for at least half an hour and were practicing on themselves, when the order came. "Over the Top Boys!! Up and At Em!!"
A thousand men go over the top with the piper playing."DAH DAH DA DA DEE DA DAH DE DDL E DAH DE DAH DAH DAH".
"BOOM!! CRASH!!" arms and legs flying everywhere
There's a hundred of them left, they go charging on...."DAH DAH DA DA DEE DA DAH DE DDL E DAH DE DAH DAH DAH"
"BOOM!! CRASH!!" Ten of them left....."DAH DAH DA DA DEE DA DAH DE DDL E DAH DE DAH DAH DAH"
"BOOM!! CRASH!!"two of them left....."DAH DAH DA DA DEE-----The trooper interupts the piper

"For #@*%# sake, can't you play something they LIKE!!"