(cut to 100 seconds, with sound)
Throw an assortment of metal objects at a few stacks of rare earth magnets using a high speed camera mounted on a cast iron surface, and edit out all the gaps in action and you'll get something like this video. This 100 second version has been made for submission to a film festival and to accommodate specific time parameters.
original file: IMG_6131__Pro-Rez_edit_100_sec_cut.mp4