Here's one thing I was taught in class both in the classroom and pool, that seems wrong to me and the only way we ever did it, which to me means when you get out in the world, this is what you do otherwise it wouldn't be taught this way....When someone comes up to you and gives you the out of air signal, you remove your 2nd stage, put the octo in your mouth and give them your second stage. The reason being is, they are gonna go for the air supply they see. Doesn't seem right for me to remove my air and pass it, why not just give them the octo right off the bat, isn't that why it's been hanging there all this time?When I talked to a Master from another agency they said twist your body to the left and hand the octo over.Having said that, I just bought a BC with an Air 2 so I'm gonna be pulling the second stage outta my mouth anyway but unless the industry/sport is totally switching over to Air 2's it just doesn't make sense, in fact the instructor added an octo to his regulator (having an Air 2 setup) for the classes so he could demonstrate how to do the switch. I was a lifeguard and Combat Medic in the Army and during training for both, we were never taught to put ourselves in danger prior to helping someone out, that's not to say I didn't/wouldn't, it's just not what your are taught.