Who taught her that you hit the magic elevator button to go UP in the first place!
If they covered gas expansion in class...
If they taught them to use their FINS and not inflate the BC...
If they trained what to do, even in a panic it should have been swim not inflate...
Then she wouldn't have been riding the inflator button in the firstplace.
I have to admit when we did rescue dives in OW class. We were supposed to buddy up and surface doing buddy breathing... Surface by swimming not using the BCs.
Well my victim to rescue (a PADI DM trainee, visiting the NAUI class) wasn't kicking at all and was heavier then I am. So after a few moments of hard finning, I hit the power inflator to compensate. That allowed me to SWIM us to the surface controled, not just float up on an expanding bubble.
The class instructor's first comment was "WHO HIT THEIR POWER INFLATOR!" I responded that "I did, he wasn't assisting in the swimming and I couldn't lift him without adjusting my bouyancy." At that point the Victim chimes in "I was supposed to be swimming?" "Yes" I say "It wasn't unassisted diver rescue if we are buddy breathing." The class instructor then compliments me for quick thinking and good problem solving.
The instructor since then durring sport dives paired me with divers she knew were hazards to themselves... Because she knew I'd keep an eye on them.
You don't have to be a DM or Instructor to have a clue and be able to rescue people. Your a scuba diver... You should be ready to rescue yourself and your dive buddies every time you enter the water!
You did a great damn job!!! The choises to made were absolutly correct! You both lived and no one was injured. You might do things differntly next time, but you took charge and helped out when it was needed.
For all we know the rest of the class was stressed and the instructor needed to work keeping them calm.