I don't remember dreams very often, but fortunately I recall this one from last night:
I'm on a moderately full train - all the seats are full but no one is resorting to being stood up. Its summer. The guy sat next to me suddenly gets shot in the back of the head by two gunmen who are sat casually behind. No one around reacts. More people keep getting shot from behind, but no one seems to notice. I realise that we've passed my stop, and begin to worry why the train hasn't stopped. I get up, and start moving to the front of the train. The gunmen stay seated. I feel relatively safe from harm, somehow knowing that they will not shoot me. I am stood up at the front compartment of the train, when my (previously dead) neighbour appears and says, 'we have to get off'. I calmly point out that the train is moving at over 70mph and the chances of bailing out and surviving are almost nil. My companion notes my comment, and approaches the driver's cab. I do not see what happens within, but he comes out and says 'the driver is dead. And an owl.'
Then he is shot again and goes down like a brick.
I run to the front of the cab and manage to punch some random buttons to make the train stop and the doors open. By this time I assume that the mysterious gunmen have realised I am not in cahoots with them, and thus will kill me too. I walk out of the train and onto ground level, apparently in the middle of no where. I am pursued, and thus find it a good idea to hide around the other side of the train. Then I realise as there are two gunmen, they will simply come around from either side and pincer me off.
It is at that point I woke up.