Spin Balance Test
Always a neat demonstration, almost any washer will do this if the machine is on a solid floor.
A new VMW, or Samsung washer will not fly apart with this test, it may not reach top speed however.
The reason that some machines have self-destructed during the spin cycle is because the load becomes unbalanced AFTER THE WASHER REACHES A VERY HIGH SPIN SPEED, this usually happens when plastic covered items are washed and water is traped in the thin plastic and the plastic ruptures at high speed throwing the washers tub wildly out of balance when the traped water escapes.
Even a 1955 Frigidaire Uni-Matic would be destroyed if you wash this type of item in it.
Note; SQ washers are water tested at the factory so the pump is full of water and will not be damaged by running the machine without it being hooked up to water.
John L.