Just wanted to mention that IMO it`s quite wise to wear mouthguard when practicing some of the new tricks e.g. spins in front of your face and throws from behing your back to front. I have hit my nose once with the nunchuck so it`s really possible to hit your mouth area also. Anyway those mouthguards are really cheap (usually you can get normal ones with ~4 euros) so I would say it`s worth to buy/try.
