This bounce exercise aims to get your horse supple. It will also help you feel the stride, to feel the length of the stride and your eye. To be able to assess how many strides remain until the horse jump and where it will jump. Done correctly this exercise will also get an over excited horse to back off.
Getting your horse and yourself bendy and flexible is one of the key components of winning at any level in the world of showjumping. Quick thinking and tight turns will win you all those valuable seconds. Practise makes perfect and this exercise is perfect as it can be done at any height, poles on the ground is perfectly ok.