i got bit by a barracuda in the Caribbean when i was diving. i strayed away from my group as well, there was a corral valley and the group was in there, i decided to swim out to the exterior where its open water. I didn't pay any attention to the open ocean i was just checking out the reef to my right, little did i know there was about 20-30 barracuda just chillen to my left about 20 ft away, just staring at me, i freaked out for a bit and then decided not to pay them any attention. 5 mins later i get hit in the hip, one of them tried to go after the knife on my hip, tore through the wet suit, this shocked the shit out of me, i swam up to the boat freaking out, the captain pretty much just dumped some rum on my hip from his bottle and gave me some to drink haha. to this day i still have the scars.
second crazy experience was off the coast of thailand/malaysia on the island of Redang. i forgot my license so i couldn't go on any of the dives there, so i just rented some fins and went free diving. I was swimming with my mom and sister who were snorkeling and i noticed two little baby black tip reef sharks and dove down to follow them. came up for air, dove back down and they had disappeared, i was about 30M deep on the ocean floor about to start my ascent, i look up and see a big ass shark, had to have been atleast 12ft in length. it literally circled me once and swam off, def a crazy experience mainly because i had drifted pretty far from the shore and nobody really knew where i went.