Why do I pay for a late train?

The autist formerly known as wrote:
Now tell me geezer do, you ever run after a train going out of the station
'fore them modern kind as locks the doors first open the door on the moving
train, toss your case in and jump on afterwards as it speeds away, this
autist has and lived to tell the tale, you don't want to meet him in a dark
alley.

Why? Do you often toss your 'case' in dark alleys?