I don't have 200 dives, but i did have an experience relatively recently that was somewhat near panic.
So in general, i have had incidents occur and whenever they do, i seem to react pretty well to them. I keep a very detailed dive notebook, and i have listed in it things to do/check prior to a dive, things to check/do post dive, and a long list of things to keep in mind during a dive, as well as a very detailed "If X occurs, do Y" list of items. Any time someone on Scubaboard discusses something that I haven't thought of, or just some small item that could help me, i write it down. Before every dive I review this notebook, I'm by trade an engineer and it just seems like i should have attention to detail and know how all this stuff works before i take it on. I'm comfortable in the water, and i dive in Texas lakes so I'm used to somewhat low visibility, and my buoyancy/trim is getting there, so I guess I just feel confidence building dive by dive.
So I fly to Cancun for three days of diving a few weeks ago. Prior to this have only been in Texas lakes, or quick Florida trips, sites not too advanced in terms of diving. Go on cenotes dives the first day (first time doing that), going in and out of caverns, just feel comfortable, I even tell my dive partner I'm going to switch out my mask to backup just to practice while we are in the darker parts of the cavern, no problems. Next day, go on deep dive to about 85', while I'm down at the wreck, feel strong current, my backup regulator free flows, i fix it, keep going, just feel fine. I'm down there, a guy is trying to fight the current and uses his hands to do a swimming motion (i find out later) versus just
kicking, and 100% rips my mask completely off with his hand. Like it was on my face and then bam, it was just GONE. I don't even think, i just
grab my backup out of my side pocket, put the backup mask on, and I swear i don't remember doing it, my body just did it, i replaced it,
and i was fine, didn't even lose buoyancy. Perfect day of diving. Day 3, i do my very first drift dive, and current is very strong, like I've never experienced current like this. I see my first shark, a few barracuda, very cool stuff. But i was having some problems equalizing, so i was probably 6' higher than everyone else in the pack. And that was just high enough to have stronger current. I'm having so much fun, I'm looking around, and then I look and I'm about 20' from the pack. Felt like i was ok, but what was happening was i was starting to kinda drift away from the pack, faster and faster. No idea why its happening, all of a sudden I'm like 50' from the pack, and I was downstream of them. I swear then
where i was at had a current starting to point in a different direction, and i felt like the group was kinda curving and i was going in another slightly different angle. I felt (step 1) uncomfortable, like i needed to get back fast, because i was drifting away. I tell myself to point towards them and use about 50% kick to get back to them. Doesn't work at ALL. I felt (step 2) very uncomfortable, like i was in a pretty strong current and it was odd, i literally felt like i was all of a sudden in a very powerful world and i was a tiny little spec in it, hard to describe, like i was nothing compared to the water. I tell myself to kick 90% throttle back to group, it does very very little, to the point where if i kept that pace up, it wouldn't matter that much and i wouldn't make much headway, and I'd burn thru my air, and thus i feel (step 3) like on the edge of low-level panic, and maybe beginning of C02 hit, not sure. I just 100% stop at that point, breathe deep, stop thinking about things, just focus on maintaining control of my senses, and walk thru the worst case scenario. Im ok on air, im not tired, Im just worried about stuff and I need to stop worrying, but if i had OOG situation, I was too far away from my dive buddy to be able to do much about it. About three seconds later, im completely fine. i lower my altitude so im closer to the coral, less current, and i slow down enough and kick gently a bit and catch up with everyone, perfectly fine. We ascend, things are fine, and I felt embarrassed. Things were going well and it was a scenario I hadn't accounted for, and the WORST thing about this is that i felt TERRIBLE about being a bad dive buddy. If my dive buddy had needed air from me, i was NOT there for him. It was a mistake because I should have been paying more attention. Lesson learned. But the part that i will never forget was feeling a sequence of events in my mind of going thru stages of closer and closer to panic, and its like i could see it happening in my mind and i just had to stop going down that path and things would be perfectly fine.