A couple of aviation ones:

A handsome young airman lay dying
And as on the airdrome he lay
To mechanics who 'round him came sighing
These last parting words he did say:
"Take the cylinders out of my kidneys,
The connecting rods out of my brain;
The crankshaft out of my backbone
And assemble the engine again.
(On the DT... a parody of Streets of Laredo)

And of course:

The bells of hell go ting-a-ling-a-ling
For you but not for me
For me the angels sing-a-ling-a-ling
Death holds no fear for me
Oh death where is thy sting-a-ling-a-ling
Where is they victory?
The bells of hell go ting-a-ling-a-ling
For you but not for me
-- In the DT but slightly different

(I've actually sung the latter when feeling a bit 'puckered'
up in the cockpit of an airplane, and find that it does really
help. Best done alone, though...passengers just don't quite
understand.)