Dream Interpretation:Horses being Killed?

Last night I had this weird dream, ok school was over and my two friends and I were heading to the exit gate and that's where Brown big horses started running around outside, I think they were being chase by helicopters and police cars, they were running so fast that we could feel the ground shaking, I don't know but they look like they were trying to get away from the police and the helicopters plus the police started shooting them, It was terrifying because I could see the blood and everything was so real, after being shoot I saw this big crocodile and they shoot him as well. everything outside was a mess we had to go inside and look for another exit. My question is, what does this dream mean? something or nothing?