Why I wince whenever I hear someone say "Break a leg!"

Taken from one of my recent Facebook updates...crossposted to DailyKos. -- GH

I know that's considered good luck for those in the entertainment industry, but I wince whenever I see that now -- and particularly (perhaps most importantly), any derivative of "if you ever get hit by a bus/car/etc." ...

I was working... as a team leader in the healthcare industry, part of the IT department of a major PPO insurance plan managed care provider, and three days in a row I had three different individuals say to me "If you ever get hit by a bus, we're screwed."