An MRI is a bunch of strong magnets yelling at your bones.
MRI is doctor-speak for very expensive nap.
An MRI is 20 minutes of bad dubstep
An MRI is a crappy rave.
An MRI is a bad beatboxer that can see your guts
An MRI is a fax machine for the human body.
An MRI is a microwave coffin
An MRI is a fancy echo locating device for the atoms of your body
MRI, all 17 cards.