I've not been all that wigged out by MRI's, but after my bike wreck, I had to do 20 dives in a Hyperbaric Oxygen Chamber and lost my **** in there the first few times. I remember beating on the glass, pointing at the nurse, telling her to get me out of there or I was gonna murder her and her whole family. I was on pain meds too and it still fawked with me. They ended up giving me some Adavans or something to calm my nerves and I finished every dive pretty normal then. hour long each. **** is weird to get used to. You can carry a drink it, but have to crack the lid open so it don't bust under pressure. Crazy watching a Gatorade bottle shrink in while you sit there and adjust to the pressure increase. Below is what a HBOC is if you didn't already know
copied from the web:
Hyperbaric oxygen therapy involves breathing pure oxygen in a pressurized room or tube. Hyperbaric oxygen therapy is a well-established treatment for decompression sickness, a hazard of scuba diving. Other conditions treated with hyperbaric oxygen therapy include serious infections, bubbles of air in your blood vessels, and wounds that won't heal as a result of diabetes or radiation injury.
In a hyperbaric oxygen therapy chamber, the air pressure is increased to three times higher than normal air pressure. Under these conditions, your lungs can gather more oxygen than would be possible breathing pure oxygen at normal air pressure.
Your blood carries this oxygen throughout your body. This helps fight bacteria and stimulate the release of substances called growth factors and stem cells, which promote healing