Netherlands Maritime Special Operations Force jet suit training for first responder and self-extraction scenarios

A little nostalgy of what the peak of Game of Thrones was

Stainless Steel Rattleback - can only be spun counter clockwise

It's an asymmetry in weight along the left and right symmetry axis..that induces an instability... the vibrations end up causing friction, precession and the instability transform rotational energy into the rattling (basically oscillations) that end into rotational energy in the opposite direction.

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