I want to add that "experience" is relative to the situation. If an OOG situation occurs, a student probably has more recent experience in dealing with the situation. I was entering Upper Orange Grove with two highly experienced technical divers when I had a problem with a primary regulator that was hitting the water for the first time after being rebuilt. As I flashed "Emergency" with the light, the first diver who was incredibly experienced with advanced trimix dives, rebreather dives, and sidemount dives could only look dumbfoundedly at the reel in his hand since he was so focused on completing a tie-off. The second diver was so intent on shooting video that he was waiting for the first diver to act so he could film it. Yet, if I pull an OOG on my students soon after a course I'll get an immediate action of regulator donation.