I was at the gas station around the corner from my place getting me something to drink [other than beer]. There was about 4 people in line, I was at the end. I wasn't paying attention to the people in from of me I was tired from working all day just wanted to get home. Then I heard " I will show you something!" The guy whips out a knife flicks it open *click*. Before I even realized it I had my hand on my sidearm [reflex I guess]but I did not unholster it. But then the guy flipped it around and handed it to the clerk. I didn't hear the convo prior to that so I didn't know he was showing him the knife. The clerk I didn't think was expecting it either going by the look on his face. So I put my shirt back down over my sidearm tried to calm down and breath steadily without bringing attention to myself. Then I considered whether or not I needed the energy drink after all. If the manager ever reviewed the tape they would probably see me in the background swinging around my back real quick for my weapon. Something simular to this ever happen to anybody here?