What skills does a Horse have?

Horses are extremely intelligent animals .. Once they have learnt something, they won't forget it .. My horse has learnt to open her stable door, untie herself, walk from the field to her stable on her own etc. she has even learnt to pass me her feed bucket over the fence if i lean over and whistle ..

As well as being able to do this horses are able to perform hundreds of different skills in dressage from simple leg yielding to a levard (where you ask your horse to rear and stay in the air for a given time) They can coordinate their jumps so they will clear it as often as possible and without hurting themselves, but at the same time they know when jumping in not such a good idea, for example if the ground is too slippy.

But i think one of the most impressive skills of a horse is its ability to communicate, they can read our body language and other horses body language in great detail .. they can warn away each other with a subtle swish of the tail, and no matter how hard we try to cover it up .. they always know when we're nervous or upset.