Count me in on this weird fact, something I've just discovered this year (spasms started 10 years ago, I'm 52). Some friends of mine formed a band playing mostly 70s and 80s rock, started doing parties and I found that while moving on the dance floor I was fine even if I was having major problems otherwise. So now I find myself doing a lot more dancing than I otherwise would, which I suppose is not a bad thing.Probably the same phenomenon that lets me play ping-pong with no spasms during the points but constant eye spasms in between points, or lets me paint a wall without problems but have my eyes and shoulder spasm when I stop.
TomSpasm