Yes, I was in there once. I had to come out because the pressure is just like what you experience on a plane. I couldn't get my ears to pop and the lady told me I had to get out. I had just had surgery and they thought I would heal faster. I loved being in there the few minutes I did get because of the smell of fresh oxygen was so exhilarating. I tried to stay in but she wouldn't let me for fear of my ears.