On my second check out dive in open water, was a crazy but could have been a horrible ending if not for our instructors. There was 8 of us doing our check out when no sooner did we hit bottom at 24 ft when the first student shot for the surface, which our instructor followed after to check her situation, leaving us 7 remaining with the assistant instructor. when no more than 3-4 minutes a second student shot for the surface and the assistant went for him telling tne rest of us to wait there kneeling on the bottom about 15-20 minutes later our instructor returned to finish our check outs. Well by then being only 115 lbs myself in 54 degree weather had gotten rather cold. But donned my mask as instructed, removed by weight belt and refastenedthan cae the time for me to take my turn at reg. recovery now I was very cold, shivering and breathing quite rapidly but being a student I was not really sure that this would be a problem as we were just about finished. I took a deep breath, tossed my reg. retrieved it but could not get it back in my mouth good before the need for air was there. So I held it as tight to my lips as I could and took a small breath through my teeth to avoid taking water tha n finished inserting the mouth piece in my mouth. Than shortly after we surfaced but I had no strength left to get to sure so they hauled me in and out of the water. Hyperthermia was on me bad they filled my suit with hot water, wrapped me in blankets and put me in a heated car. Six hrs later the shivers finally started to subside. And I waited until June to finish my certification. Conclusion 1st student had vertigo and blew her eardrum, 2nd student had a ashisima attack which had got ok from doctor,and you know my story. But my best lesson through that experience is don’t panic and I didn’t or it surely would have been worse and don’t get cold anymore haha Judy