During the war a number of German aircraft were brought down by Russian fighters ramming them and chopping off vital bits with their props, so there is some precedent - except the car should have been a Volkswagen!
However, Henry T refused to help Britain in her hour of need, which is why the Merlin contract went to Packard, so maybe there is some 'poetic' justice here after all.
My caption suggestion is:
"These new variable length props do take some getting used to"
Commiserations Aerostar2, you guys fly a great display.
RD