Played in one a few years back. One of the younger lads I was playing with had obviously been watching Sergio at the hight of his 're-gripping 40 times before the shot' phase. This young chap seemed to do this with every club, even the putter ! You can guess the rest, I think the pro even had a couple of twitches late in the day after being subjected to that for 4 hours.

Took me a couple of weeks to get back to normal after that one!