I've done a ton of roadside repairs.... changed injectors/pumps on the big truck in weird places.

The best was a friend of mine, he was driving a semi truck from here in Ga to NJ to campbell soup. Anyway if ya know Camden NJ it's a pretty town :-)
As it goes, middle of camden, at night the engine starts making alotta noise.
Basically the turbo grenaded and made a mess of the engine. A cylinder head, turbo, and a few pistons get loaded into a taxi and he repairs it in the middle of the city and drives it home to Ga. We joke that no one wanted to mess with "that crazy redneck stealing the semi truck engine"

My father in law once blew out a hydraulic slave in Indiana.... he needed to get the load home and floated the gears back to Ga. Lucky he didn't have to come to a stop :-)