Kinda like my experience when I was learning..

She panic that's why ripped her mask out..

I had a similar experience when I first time go into the training swimming pool.
My BCD wasn't fully inflated when I went in and I sank to the bottom.. and panic since still not used to breathing through regulator..
The instructor didn't see me for a while since there were other students while I am stuck at the bottom and no matter how I kick also can't go up since the weights are pulling down..
When panic and no experience, will not remember anything...
Damn scary.. thought gonna die in a swimming pool.