I found it to be a perfect use or 3D, and not the over gratuitous use of 3D like we see in a great many films right now. I have a great friend who I am trying to talk into diving. and a bubble watcher wife who I am trying to convince to learn to dive, and allow me to splurge on cave and cavern gear and training. The way I described it to my best friend is; "Great movie, it's a shame you shouldn't see... Yet." I then went on to explain that as a non diver, it might prejudice him about cave diving, that it may instill some reasonable and even unreasonable fears in him. I told him it might be a disservice to his desire to learn to dive if he saw it before he had a solid structure on which to base his perceptions. He felt that was a reasonable approach. My wife I just had to outright lie to her and say it sucked. She already has claustrophobia issues where diving and snorkeling are concerned.
In my case, SPOILER ALERT
When they were crawling the constriction the first time, I caught myself holding my breath, then I cursed at myself for even thinking to hold my breath in the first place given the forced perspective of being under water. It then made me wonder if i would hold my breath in a tense situation underwater. Then there was the sudden attacks of claustrophobia I felt during both of the constriction scenes. The 3d effect and the perception of such a tight fit, and me holding my breath seemed to induce some artificial, albeit real panic attack around a feeling of claustrophobia. And I'm nowhere near claustrophobic. I guess different peopel will see thsi movie different ways, but it really made me reflect on myself inwardly as a diver, and hopefully in some small way, it made me safer, and more conscious of my involuntary breath holds.
But as far as thriller movies go, this one is great, it's just a shame I'm a little iffy on my close friends seeing it if they plan on pursuing diving.
