This is my experience of it- i cant feel the pressure of the air around me and my body and mind go numb, and have no emotions at all not for myself or other people. Everything feels incredibly unreal and i normally start panicking, its like being trapped in a nightmare but you know its not real. I only experience this is a very powerful panic attack. I suppose its when youve got so much adrenaline going round you you have an out-of-body experience. Its pretty cool looking back on it, its terrifying when it happens.