MRIs in motion show what happens on the inside

I've previously written on the benefit of MRIs taken under real-world conditions, where the patient is sitting or standing upright during the MRI. These types of MRIs are invaluable for explaining why some patients experience certain types of pain patterns, even when recumbent (lying down) MRIs can't always explain pain.

Here's an interesting video compilation of MRIs images set to motion (warning — brief clip of sexually explicit content):