I can totally visualize a DM in Cozumel describing Devil's Throat in a way that someone with 100 dives who has liked every swim-through she has ever done might not understand that it's in a different league from other Cozumel swim-throughs.
An important challenge in learning theory is that a novice doesn't know what he doesn't know, so it's hard to even formulate the right questions.
I think it's a bit harsh to criticize Scoobajay for not communicating before the dive that, for example, she wasn't comfortable in confined, dark, overhead environments, with no buddy, no redundancy, and no lights -- in her experience, a "swim-through" was a short... well, swim-through..., not a cavern dive. To make a ridiculously extreme example, if the DM had given a dive briefing that they would do a "deep dive" and then led the group on a bounce dive to 1200', and Scoobajay aborted the dive at 130' and hung around until the rest of the group came back up, should we criticize Scoobajay for not communicating in advance that she's not technically certified, does not like to do air dives below 130', doesn't have the correct gas mixes for such a dive, doesn't have enough gas for the dive, and isn't suicidal? For all of you who already know what the Devil's Throat is, you already know how dark and confined it is; but for someone without that knowledge, it's not obvious the need to ask. (I am not questioning the
great advice from all the all the experienced divers in this thread; I just think the tone of some of the posts is a bit harsh.)
BTW, one of the benefits of a thread like this -- not for Scoobajay, but for all the lurkers now and in the future -- is that anyone who reads it
will have a better idea what they're getting themselves into, and
will have a better idea of what to ask. Shortly after certification, I had a chance to dive in Cozumel, so I started reading old Scubaboard threads. I couldn't keep all the dive sites straight in my mind... "Devil's Shallow Punta" "Cave of the Sleeping Columbian Barracudas" etc. But thanks to a thread like this, I memorized two names "Devil's Throat" and 'Barracuda", and knew that if either was the dive site, I'd sit the dive out.
(I'm somewhat surprised not to see more responses opining that Devil's Throat is not appropriate for non-overhead-trained divers with a single AL80, as that seems to be a very common Scubaboard opinion whenever this dive gets mentioned. I'm guessing that a lot of Scuababoard regulars are grieving the loss of TSandM -- it pains me every time I think of this, and I never even met her -- and aren't as active on other discussions.)