Climbing for jump altitude one late winter/early Spring morning, smoke
started rolling in under the instrument panel of the C180. With four
jumpers and the pilot on board, the pilot began to muse aloud, "Boys, it
think we got... "
Before he could get out the last couple of words ("...a fire or
something?"), the jump door flew open and the four jumpers were gone!
This was about 30 years ago.
The pilot stayed with the ship and successfully landed. Inspection
revealed a birds nest on the rearmost cylinder which was missed during
preflight.

Andrew Sarangan wrote:
Why would someone jump out of an airplane due to a burning smell?