One time I freaked out pretty bad in an MRI.In a previous life I taught confined space and trench rescue..... Going in the hole wasn't a problem for me....
I'm a little clausterphobic anyway. I have to keep my eyes closed the whole time, and there has to be cool air pumped into it. Well this one time I had my hands folded on my chest, and I had worn a warm shirt.. and I kept thinking "This is how it would be in a coffin, hands folded, hot." Which led to me thinking about my mom in her coffin... which led me to open my eyes to make sure I wasn't IN a coffin.. which led to seeing how cramped it was.. which led to me starting to sweat...which led to me hit the stupid panic button.
ANYWAY.... I hope it's fairly good news Captain.