Yup.  A few times.  Not very hard.  It was more like a counter-instigation/escalation technique.  (Which fortunately didn't happen since, a) as I mentioned, the guy would have thrashed me, and b) I probably would have lost my job -- not that I cared much at the time due to the continuous stress due to the personal bullshit and 60-90 hour work weeks, but still, not a great career building move.  I wasn't thinking too clearly at the time.)
Like I said: proud, mature moment in my life.