L should actually be for MRI but tomorrow's M is already taken and this seemed to fit quite well, despite the coarse nature of the original meaning of the expression, so apologies for that.
On Monday I went for a Lumbar MRI and after all the prep for it I had a panic attack and had to be pulled out quite quickly.
I was quite cross with myself for my reaction, especially once I had calmed down about an hour later and thought rationally about it. I realised that my head would be going no further in the tube than it had been at the beginning, so there wasn't anything to get excited about, I just needed to calm down and lie back and think of England.