Ahh Ian , your sense of humour isn’t as good as the CAA’s though. They tried to have us believing that drones are at risk of crashing into passenger aircraft at 30,000 ft 
ossshhh…
After angry birds, the thing that scares me most. Helicopters. Living in a " V" shaped valley, and tenth of " V" shaped minor valleys, glacial origin, it is very common to hear ( every twenty miutes or so ) touristic or safety helis. They often are at my height and no more than half a mile away…