I own my own business so for me to leave a review ...

I own my own business so for me to leave a review takes a lot. I purchased some parts for a lamp and was checking out when one of the "old, bald" guys asked me about my barber shop and some of the services we offer. I answered his questions, paid, and turned to leave. Just when I got to the door I hear him say " why don't you shut-up". I turned to look at him and when he realized I heard him, he quickly looked to the other clerk and pretended to have a conversation. I walked back, stunned, and asked him if he said something to me. He looked sheepish and said he was speaking to the clerk. I could be wrong. I could have misunderstood. He could have been speaking the truth. But body language and shifting eyes sometimes speak louder than words.