I sit next to the percussionists in my Jazz Ensemble. Recently they've decided that the bongos weren't enough so they occasionally reach over and give ye olde upright (implying that it is probably at least 10 years old, or at least looks that way!) a smack. The rest of the bassists (who don't play upright except when fooling around) think that it's not a problem. I'm a little worried though. Can this sort of thing cause damage to the bass?