Go and Jump No More
I had to stiff-arm a guy who was so impatient that he cut in front of a bunch of people in the queue and then tried an end run around me on the train platform while a large group of people were exiting the carriage.
After blocking him I gently touched his shoulder and said: "Please wait." What I really wanted to do was grab him by the collar and haul him backwards, but although it would have been satisfying, it wouldn't have taught him proper manners.
I have no idea whether the soft approach worked, but here's hoping.
Learn to create beautiful images with digital