I once had an infection in the cavity that used to hold my wisdom-tooth - while vacationing in Vietnam. I went to the hospital and eventually had a
x-ray taken of my head (one side of my head was pretty swollen).
As I laid down in the examination room with the x-ray machine, I noticed that it was a Phillips-brand x-ray machine, but it seemed really
oldfashioned, compared to what I've seen elsewhere, but this was a public hospital in Vietnam (where healthcare is free, btw)
Anyhoo, I lied down, and the technician placed the photoplate under my head, and the emitter pointed at my jaw, where the infection was and took the
picture.
But as the machine took the picture I felt a numbing in my head, like a really loud noise, paralyzing me for a few seconds... it was really weird,
although it only lasted a moment.
I've had numerous x-rays taken of various parts of my body before, and quite a few of my jaw, at the dentist, but I never felt this sensation
before.
The doctors prescribed me some antibiotics and gave me the x-ray pictures to keep and I was on my merry way, and had a wonderful vacation after that.
Oh, and since I was a foreigner, they charged me all of US$ 7

for the whole thing - examination, x-ray and antibiotics
But yeah, I guess in some cases, one can actually "feel" x-rays