Space debris?
There is shit falling to earth on a daily basis. Some of it makes it to the surface but, 'cos the surface is so big, most of it goes unnoticed. It must be at least a million to one chace of a plane being hit but, we all know what is said about million to one chances.
Being a bit crass there but, one day, something flying is going to be hit by space junk/ meteorite. Why not the other day?