Just in case you were curious as to what happens when you put a brick in a washing machine on a trampoline...
Video Edit: @viralnova365
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Slinky Treadmill @exploratorium: kinetic motion energy transfers to elastic potential energy and then back to kinetic energy in a cycling process as a slinky spring "walks" down an incline. Put the system on a treadmill, such as this one at the Exploratorium in San Francisco, and the walking behavior can be explored for many minutes. Note that after a while the slinky's walking becomes erratic. With special thanks to the Exploratorium! Credit @physicsfun.