.. and another Oz example. Many decades ago a Chipmunk (and the two crew) was lost when a coin of the Realm became lodged in the front of an uncovered stick stub. This duly restricted forward stick movement and precluded recovery from whatever manoeuvre the intrepid pair were doing at the time. A long time since I read the crash comic report on the accident so the details may be a little vague - but the result was still fatal.
There have been numerous incidents of control runs snagging due to deterioration of one kind or another - if it can be found on the ground, then who really needs that kind of excitement in the air ?