So today I was doing my training, warmed up, trained some footwork, some punches and basic kicks, what I always do basically, moved into the nunchaku training, it was going alright, then I saw this new move that I had never tried before, and overhead spin, started it with my right hand, went fine, did a few repetitions, changed to the left arm, I thought, maybe I should practice this move with the foam chucks, next thing you know I saw white, and then my vision got back to normal, I hit myself in the freaking head with the nunchaku, I didn't break my head, or got KO'd,now I have a bump in my head, it doesn't hurt to touch, it definitely hurt when it hit me, luckily the spin of the nunchaku didn't hit me in a way that would really fuck me up. I took this a sign of the universe to train more intelligently.lol.
So yeah, you live and you learn... I guess.
We have to be smart, specially when trying out new stuff, we have to be careful and safe at all times when training.