I was knocked off my feet, when just a lad, by a medicine ball thrown at my stomach during gym...I still remember the way it felt for three days after. Why are (or is it were; have I outlived them and thus avenged myself on the instrument if not the perpetrator) they called medicine balls?

The ceiling-hanging, spot-dancing balls were called glitterballs at the palais. But not named after Gary Jesuit Glitter.