Some funny horse trivia:

1.) An average horse weighs nearly one-half of a ton, and its brain is just the size of a potato!
2.) A horse poops about 12 times a day
3.) Horses don't throw up (or sideways?)
4.) Most of the time, horse point the ears when they are looking.
5.)  Horses lock their muscles in their legs when they go to sleep, so that they can sleep standing up and not fall over!
6.) A horse's hoof is analogous to the human fingernail, so technically, horses stand on their middle fingers!

http://www.dressageart.com/horsefacts1.htm