He must have been a retired German policeman - at the 1975 RAF Wildenrath air show, he and his colleague had their Bundespolizei VW beetle nabbed by a Wessex, which then dropped it from a significant height into the wooded area to the south of the runway. Unfortunately the smoke grenade in a coffee jar did rather a better job than planned when the jar smashed in the impact - it set the woods on fire!
The Germans loved it as it was an excuse to laugh at 'Polizei' - a couple of groundcrew lads in borrowed uniforms chasing the scrap VW they'd painted to resemble a police car, firing blanks and shouting oaths at the helicopter and its crew, followed by the farce of the entire fire section charging across the runway to put out the fire!