So it was somewhat scary to come across this web page with pictures and stories of objects flying into the MRI. Since it's a giant magnet, any nearby metallic objects tend to fly at it with great speed. If a person had been in there when, say, the large floor buffer flew into the tube, they probably wouldn't live to see their brain's data in a science journal. Apparently there is also a danger of being eaten by a tiger while in an MRI.
I wonder what part of your brain lights up when you've been impaled by a sharp metal object?