Every single damn wedding I've been to in the Boston area.
I've gone out of my way to ruin that song for as many people as possible. The crazy guy in my group of friends up there (he's our Alan from the Hangover) is named Klein. I've managed to convince a few people that the lyric is "I've been in Klein". It did the job, they can't listen to it anymore.
But anyway, Parkinson's is a B word. My dad got the absolute worst of it. His dad had it too, so I can't wait until it's my turn.