Crane hits power line - GIF

[desbromilow]

Before one performs electric welding on cars, he should disconnect the battery, we are talking 80 volts welding. Imagine what thousands of volts from power line will do to a vehicle.

typically the HV will track through the carbon in the tyre rubber and conduct to Earth, heating up the tyres until the y explode, and start burning. With the tyres alight, the rest of the vehicle follows pretty quickly.
All crane drivers in Australia are trained on how to exit a crane in contact with overhead lines, so they aren't hit by the resulting step potential as the crane and earth become part of the circuit.