One day, I was at my local pool, I wanted to get a bit of practice doing statics with compressed lungs (by going to the bottom of the 10 foot pool). I was annoyed by my constant moving with the currents, so I borrowed a weight that they use for training (the brick thing). so I was on the bottom in a crouched position, my head pointing somewhat down, but occasionaly I would look around to make sure I wouldnt hit anyone on my way up, so I could be prepared and not have to wait for people to pass. I was wearing shaded goggles (I never do that anymore) so it was hard for others to see what I was looking at. after looking around I was staring up as some girl was directly above me, and i had to wait until she would pass. so i had to wait like 5 more seconds, to help make concentrate I just closed my eyes and looked down.
suddenly out of nowhere a punch comes flying in my face just as I open my eyes. I grabbed the guy, twisted his arm and he let all his air out, I kept him on the bottom and with him now taking in water I threw 2 punches at his stomach and ribs, and after he kicked me, so I flung the brick in his face.
I brought him up (unconcious of course) and got the life gaurd to pull him out. after a few minutes he woke up (and got the water out of his throat) he explained that he thought I was watching the women, and that he didnt know I was training. no charges were pressed as he hit me first and I agree it was discrimination. the life gaurd actualy promoted the idea of him puching me, so in order to not get fired he got me a months free pass to the pool, YEEHAA. as for the guy, I talk with him now and then, hes pretty cool.
learning from his mistakes, I would not punch someone without prior conversation (and definately not underwater)