The water rushes in, and instinctively, Morgana tries to step out of its way, but cannot due to the torrent. Within a matter of a few seconds, it is nearly up to her knees.

"How do we do that?" Their exit is currently gushing water -- not purple water -- at them.

It's not a useful question, so Morgana moves away from the door, looking to see if there is hidden exit somewhere.

And comes up short.