Back when I was about 20 I took the head and inlet manifold off of a Ford Cortina Mk2 and at the time it was parked half on the pavement and half on the road.
An annoying neighbour insisted I move the car so being all alone I decided it was easier to put it in gear and use the started motor to move the car.
I stood back to check the car had moved far enough and noticed flames on the ground underneath the engine.
I had forgotten about the mechanical fuel pump and HT leads.
Fortunately I managed to beat out the flames.