Hmm. Yes. It was one of the swimming pool exercises:
- Take off everything (but the wetsuit). Leave it on the bottom. Go back to surface and then go down and recover/put on equipment.
- Take of mask. Put it againg. Clear.
- Share air with buddy while swimming horizontally (there was no depth to do it vertically).
- Take belt off and on again.
And some more I don't remember, other than all the "out of the pool" equipment management and tests. Getting your mask removed was just one more.
There were also some basic swimming tests with no equipment too, iirc.
Didn't know that.
Why? It seemed (and still seems) like a perfectly reasonable training. How else can you prepare for getting fin-kicked maskless during a dive? (and in my tiny experience I've had that done to me more than twice).
Most recreational agencies prohibit instructors from removing a student's mask without prior notice ... it's a violation of standards.
But even if your instructor is allowed to do this, there's something missing ... perhaps because you didn't mention it or else because the instructor skipped it. That would be having you remove and replace your mask voluntarily a few times prior to an "unannounced" removal. This is an important step ... first because it helps you overcome the instinct you mentioned, and also because it helps you develop a "technique" for recovering and replacing your mask.
A lot of new divers struggle with the mask removal exercise, for a number of reasons. Some, because of a strong "mammalian reflex" that has them believing their regulator is leaking as soon as they feel water on their nostrils. The instinct to bolt to the surface is strong in these people, and needs to be managed carefully. Others struggle because they have a hard time getting the mask on their face and getting it to seal properly ... usually because they have hair that is interfering with the process. This also needs to be managed, and sometimes that takes some changes to how they're wearing their hair. Still others ... if they're using a hood ... have to learn how to get the mask skirt back under the hood once it's in place. Students who struggle with the sealing and clearing process need time and practice to learn how to manage it. A successful mask clear that results in a continually leaking mask is no success at all.
Then there are different approaches to mask replacement that work better for some people. I have students who are more comfortable pushing the mask in place, clearing it, and then fixing the skirt and mask strap. I have students who are more comfortable fixing the skirt and strap first and then clearing the mask. There really is no "standardized" method that works best for everyone, and you need to try it both ways to find out which one works best for you.
What I do with my students is start them out removing their mask, retaining possession of it, and replacing it. Once that's done comfortably, then I ask them to take it off and hand it to me. I'll let them take a few breaths, then place it back in their hand. After they're comfortable with that, depending on the student, I may ask them to remove their mask, place it on the bottom of the pool, and then find and replace it.
At no time will I remove a student's mask ... that would violate my agency's standards ...
... Bob (Grateful Diver)