[nilamo]

My experience seeing animals is apparently different from yours. The anticipation/tell is very clear for a wide range of animals... Birds squat down before taking off, cats hunker down to the ground before pouncing, etc.

Even the human jumping example again... Suggesting people only bend their knees for performance would mean the "normal" way of jumping involves keeping your legs straight at all times and using your ankles/toes for all your thrust?