How to Do a Back Handspring. The back handspring is a basic building block for many gymnastics or cheerleading routines. To do a back handspring, you have to fall backwards, land upside-down on your hands, and push upwards to land back on your feet.
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Now, a new computer model that simulates these periods of mental wandering may give scientists clues about how our brains work. Specifically, the model shows how our brain cells communicate when our minds are either engaged or idle.