If you don't have the skillset to shoot a moving target, at distance, while that moving target is surrounded by multiple, moving, screaming innocent others ... well, if you don't have the skills, don't make a mental plan that depends on you having those skills.
If you don't routinely carry a tool that would make that kind of shot possible ... again, if you don't routinely have that tool with you, don't make a mental plan that would depend upon you having that tool with you.
If you don't have the physical skills that would help you tackle and prevail against a healthy, adrenalized, aggressive young man, don't make a mental plan that depends on you having those skills.
If the thought of running away without doing something bothers you, and if you agree that these types of events are in fact possible, maybe it's time you did the work to get the skills you anticipate you might need in order to make that desire actually mean something.
My personal website: Cornered Cat