PWA, happened on other aircraft too but I shall spare you the details.
On jet blast however, at Scampton, in the 60s the sqn cdr 'hurled' the QRA staff car on to the dispersal and the crew leapt out and boarded the jet. Before the policeman could move the car the aircraft started engines.
After the practice alert was over the QRA car, a one-ton Standard Vanguard estate, was some 100 yards behind the aircraft having been rolled several times by the jet blast.