first remember that my advice plus $ will get you your favorite beverage at your favorite café/bar
if confronted
bluffing may only be partially successful ( so far, personally, it has worked for me but - - - )
always:
know your surroundings
don't overestimate your ability and/or speed
insurance is good you may want to " compromise "
last resort, using a weighed object in self defense might help especially if on a sling ( momentum you know ) but costly
if you only get the other person mad, boy are you in trouble then
[ this post is in jest only, I do not recommend fighting ]