Passenger O was on the train for a long journey and he was desparate to go to the toilet.
However, the toilet was under maintence. Without much other choices, he has to treat the window as urinal.
A passenger in the long journey train and he was dying to to go to the urinal, otherwise he would probably wet his trousers. Unfortuately the toilet was out of order and under repairing. So he had no other choice to climbed over to the window and pass the water through.
A passenger 0 is the top of the long distance train very it nasty urine, if Ju Wu go to the toilet will depend on, and at that time the top of the train since toilet just in the middle of maintaining, so the Ju had to to live window Li.