Thought you handled it well.
The only thing I mighta done differently is actually call the police, using their non-emergency number. Several purposes served here. First, the guy is drunk in public and he's making threats - both, whether individually or combined, are illegal, and that calls for a visit from the boys in blue (or whatever they wear in Louisville). Second, even without an arrest or charges against the drunk, a good talking-to from the police might chasten him somewhat. Finally, and in the extreme eventuality, you establish a record of his past beligerent, threatening behavior (or even a pattern of such behavior, if it came to that), which may help exonerate you if you ever did have to resort to violence of any kind to defend yourself in the future.
Just my thoughts.
The only thing I mighta done differently is actually call the police, using their non-emergency number. Several purposes served here. First, the guy is drunk in public and he's making threats - both, whether individually or combined, are illegal, and that calls for a visit from the boys in blue (or whatever they wear in Louisville). Second, even without an arrest or charges against the drunk, a good talking-to from the police might chasten him somewhat. Finally, and in the extreme eventuality, you establish a record of his past beligerent, threatening behavior (or even a pattern of such behavior, if it came to that), which may help exonerate you if you ever did have to resort to violence of any kind to defend yourself in the future.
Just my thoughts.