Dejibo, I just wanted to wish you luck.

I hope your MRI goes on without any problems and that your results are negative for growth, and no new lesions.
I do what the others have said. I also ask for a form cushion knee lift, to save my back from too much pressure from laying on that hard surface. Lots of blankets too.
Eyes never open from the time I lay on the table until I am out. I don't even open them for the shot. When they talk to me I don't even hear them. I am not there physically, in my mind.
I wear a sweat shirt with the hand pocket in front. I put my hands in there to keep them warm, also they don't jerk. I use self-hypnosis and fall asleep.