...NASA calculated that a piece of Skylab debris had a 1 in 152 chance of hitting someone.
Luckily, there are several billion of us "someone's" on the planet, so the likelyhood of me being that specific someone that gets hit is fairly low.
I remember those Skylab days too. I recall you could buy "Skylab warning hats". They were a tinfoil cone that you wore on your head. And if Skylab was about to hit you, it would hit the hat first, causing a crunching sound, therefore giving you .0007 nanoseconds warning to step out of the way.