Whirlybird
It sounds like you might have the same sort of luck as Brian Lecomber. He wrote an article in Pilot many moons ago in which he describes how his throttle jammed closed........... while he was at the pumps! This was just after an aerobatic sortie in which the throttle was closed several times. He then goes on to describe other similar events and claims that, if you look after your aeroplane, it will look after you.