A few times, yeah.
Once I was outside the front gate of Omor during a siege, half-tucked and feathering dudes off the wall. I saw an enemy go to re-man the ballista and do a double-take my direction, like we were co-workers who just saw each other unexpectedly out in town. It was sorta surprising; a normal human reaction like that.
Then his ballista bolt hit me in the ****.