There was one in May of 88 where an IANTD trimix instructor took his students on their first trimix dive to 300' in FL. As if that wasn't enough, one student experienced an uncontrolled descent while she was supposed to be in deco and he did not realize what was going on (he was working on a downline or something) until she was quite a ways below him. One of the other students tried to get to her but efforts failed and someone ended up doing a body recovery.
Guess it goes to show you that you have to thoroughly check out your would-be instructors and refuse to play ball if you are placed in possibly unsafe conditions.
Guess it goes to show you that you have to thoroughly check out your would-be instructors and refuse to play ball if you are placed in possibly unsafe conditions.