Keep an eye out for the guy outside your work, he might be waiting for you. And maybe look into getting another job if that's how your supervisors treat people. Either way, good luck!

Sounds like your managers are just asking to get sued or fired. They deliberately put you in harms way, it is obvious this guy had problems he could be seriously dangerous yet because they wanted a few chuckles they stood back and watched. The guy should have been thrown out of the store straight away and the police should have been called. I feel for ya OP. You should put in a complaint to their bosses I'm sure they would love to hear how your managers let a drunken homeless chase you around the store screaming, not only did it put you at risk but it would have cost the business customers because who's going to go into a store with a drunken lunatic in it.