Strangest examples of good or bad luck?

[Delta Wing]

A single sniper succesfully assaulted a T-72 which drove next to it. It must have been like a scene from a bad action movie.

In a Finland vs Russia game the Russian AI once blasted a small village which could have been a good deployment zone with a huge TOS-1 barrage. I didn't have any units there at the moment. The Buratinos revealed themselves in the process and were then taken out by my own artillery.

I haven't had any really catastrophic luck. Some annoying friendly fire incidents with either aircraft or artillery. Worst was when an uncannily succesful mortar barrage from the enemy wiped out one of my infantry company HQs and a very experienced HMG team.