1 RR Merlin or multiples therof
2 A multibank or radial Sherman starting up
3 The Dodge starting on the 1st turn of the engine after 2 months in the garage
(on 6volts)
4 the gut wrenching mashing of teeth of a jeep starter churning over and over and over on 12volts after electronic ignition and a total rebuild by a 'volt nazi'
5 A Gibson Les Paul through a very, very large valve amplifier!