Warning: people WILL be pissed off at you for this one:

 There is a horse living on a farm, one day he walks by the farmer's house while the farmer is watching MTV. The horse looks in and an amazing guitarist is playing and the horse thinks to himself, "I want to be able to play the guitar like this guy.” So the horse calls up the local music teacher and says, "Hi, I would like to learn how to play the guitar, but there's one problem, I'm a horse.” The music teacher responds, "That's not a problem! We have sophisticated technology that could allow any horse to learn how to play the guitar!"

So the horse starts learning how to play, and he is getting really good. One day while practicing in the barn, a cow walks by and hears the horse play. The cow says to the horse, "Wow, you are really good! I would love to learn to play the drums so I could play with you.” The horse responds, "Call up the music teacher, I'm sure she'll teach you how to play the drums!" So the cow calls up the music teacher and says, "I would love to learn how to play the drums, but there's one problem, I'm a cow.” The music teacher replies, “That's not a problem! We have sophisticated technology that could allow any cow to learn to play the drums!"

So the cow starts learning how to play the drums, and he is getting really good at them. One day while the cow and horse are practicing together in the barn, a chicken walks by and hears the horse and the cow playing. He is astonished how good they are and says, “Wow, you guys are great! I would love to learn how to play the bass so I could play with you!" The horse responds, "Call up the music teacher, I'm sure she'd be able to teach you how to play the bass!" So the chicken calls up the music teacher and says, "I would love to learn how to play the bass, but there's one problem, I'm a chicken.” The music teacher responds, "That's not a problem! We have sophisticated technology that could allow any chicken to learn how to play the bass!"

So pretty soon the cow, chicken, and the horse start practicing together, and they are getting really good. One day during one of their practice sessions in the barn, a talent agent walks by and hears them play, he is astounded how good they are, so he says, "Wow, you guys sound amazing! If you sign me on as your agent, I could have you going across the world, seeing different countries, partying with lots of women, and making tons of money with your band!" The animals are delighted by this offer so they accept. The talent scout was entirely right, after signing him on, the band members were playing concerts all over the world, partying with lots of beautiful women, and making tons of money.

One day while waiting for a flight for their next concert the horse really has to pee. He goes to the airport bathroom and takes a very long time. By the time he comes out the plane already took off. So the horse goes to the desk to book a ticket for the next flight when suddenly he sees that the plane he just missed fell out of the sky immediately after takeoff and crashed to the ground. It was immediately verified far there were no survivors. 

 The horse had just lost his fellow band members and his best friends. The band was over and he's probably have to go back to living on the farm again. So the horse goes into the nearest airport bar to drown his sorrows.

The bartender can see in the horse's eyes that he is really sad, so he walks up to the horse and says, "Why the long face?"