I cant wait till I learn to scuba dive, but I cant help but to think, how I would react if im under water and see a huge shark like a White shark or a Killer Whale.
Im sure my reaction would be to get out as fast as possible, but knowing its not safe to surface so fast, I wonder if I would be able to stay calm enough and take my time getting out of the water
I guess I have to begin to mentally prepare myself starting now, knowing I must stay calm and not to surface to fast and risk getting sick. But if a scuba diver is being attacked by a shark or killer whale,

Wouldnt it be best to risk getting the bends instead of getting bit or even worse eaten
Have any of you had such an experience? If so how did you react? I was told that Killer whales avoid scuba divers because of the sounds of the bubbles and the way they look??? But I do recall hearing about a scuba diver being hit really hard by a killer whale, but he survived???
Is there a company out that makes some sort of electrical device which can give off an strong electrical current or something that could scare such large dangerous creatures away?