What?
Like, the thing about the hand aside, if something is extremely unlikely, that literally speaks to the odds of it happening. That's what unlikely means.
Your hand covering your face isn't coincidental or unlikely; everyone's hand does and it's written into your genetics that it should.
There's no particular reason why a big rock should end up in the particular place it did for us, and it's surprising that it did.
It's not likely that it happens often because there's no reason for it to happen, unlike other interesting phenomenon we see like the big red spot on Jupiter or the hexagon on Saturn. Those should be common because there's a systemic reason they happened.