riding roller coasters might help dislodge kidney stones

It is not entirely rocket science to pass a kidney stone, but it can be lifted from Space Mountain.
Shaking, twisting, and diving from high places seems to help small stones drain from the tubular maze inside the kidneys.
Two researchers took the Big Thunder Mountain rail roller coaster in Disney\'s Magic Kingdom in Orlando, Florida.
Twenty fake kidneys were hidden in the backpack.
Researchers from eastern Lansing Michigan State University School of orthopaedic medicine planned the study after several of their patients returned from the theme park to announce that they had passed kidney stones.
In the end, a patient reported that they had passed through three stone heads, each of which was after a roller coaster ride.
\"Riding three times in a row, three stone heads --
That\'s too much to ignore, \"said David wodinger, a kidney expert who conducted the study with Mark Mitchell, his then-chief resident.