What can I do when a neighbor behaves in an obnoxious manner?

I recently moved into a large apartment complex. A man who lives nearby introduced himself and seemed friendly enough. The next time I saw him, he started to yell out to me, causing anyone in close range to pay attention. I was bringing beer home and he yelled out 'you sure bought a lot of beer'. I was... show more I recently moved into a large apartment complex. A man who lives nearby introduced himself and seemed friendly enough. The next time I saw him, he started to yell out to me, causing anyone in close range to pay attention. I was bringing beer home and he yelled out 'you sure bought a lot of beer'. I was really angry and I thought he was offensive. Is there anything I can say to him if he acts like this again?
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