I am SO tired...

The last two days I have been assisting an advanced open water course (or Advanced Adventurer which I guess is the right name in SSI world :-). Anyway, yesterday, I followed the introduction part of the course, then in the afternoon we went for two dives, and we had a night dive also (actually this was my first ever night dive, but I did not tell the students since they were more comfortable with me being behind them). Today started at 5 o clock, so this is one of the reasons why I am a bit tired (let me say VERY tired). We did the first dive around 8 at Chumphon (one of the best dives around Koh Tao Island); And we did the 'Deep Dive' (30 m) which is one of the corner stones of the Advanced course. The problem (and reason why it is a special course) when going deeper than e.g. 25 meters (depends on the person) is Nitrogen Narcosis (you simply get too much Nitrogen in your body). This basically means that some people get 'high' at these depths. This can cause many weird situations, like some people start puking, some people feel paranoid (thinking that every fish close by wants to bite), or it may mean that some people start laughing - and cannot stop. Laughing under water is GREAT (and I do it a lot), but the problem is that you may forget where you are, and stop thinking about your safety. SO we did a few tests with the students at 30 meters, like showing 7 fingers and they were then supposed to show the remaining fingers up to 10 fingers. Sounds - and IS - easy, but wow. One of the dive students started giggling like crazy instead and hardly knew what was up and down; another completely lost her sense of basic math, and gave weird answers. 7+7=10? Maybe not? :-). The good thing about nitrogen narcosis is that is disappears totally if you go a few meters up (and no hangover :-). The 'problem' is of course lack of control (like driving your car with 130kmh and you suddenly feel happy and you want to go e.g. even faster. Some people may bolt (go very fast) to the surface. Or just start behaving stupid and forgetting e.g. to check how much air you have. None of these reactions are good when you are at 30 meters!
But all did 'ok' (yet 'drugged' some of them), and others (like me) did not feel any difference at all. But people may feel it different for every time they dive; everyone feels it; consciously or not; and on some days the effect is stronger.
The second dive today was a photography dive, and I have loads of pictures myself from this dive, but I am so so tired now to start sharing them :-)
Cheers from a very tired Christian that did 6 dives in two days, and at the same time assisting :-). Time to sleep.
ANother happy day in Thailand!