Originally Posted by mysterym

I think it depends on the precise circumstances, and in this case 8 hours may have been reasonable, especially if waste facilities were no longer functional, there was no food, or water. My buddy was stuck on a train in an underground tunnel for two hours recently due to someone jumping in front of it. Folks were giving it one more hour to exit the car and take the emergency stairs out. Now he carries provisions whenever he is on a train.