Truck stop phantom at the Flying -J??

Today, I had a very strange experience while getting gas at the Flying-J truck stop in Indianapolis. I'm driving a rental car I'm not familiar with and didn't know what side the gas cap was on. I pulled up to one island and find that it was on the wrong side. I swung around and tried an island where there was a truck pulling a trailer. The pump was not accepting credit cards, so I did a U-turn at the same island, opposite the truck and trailer on the other side. I finish filling the tank and I'm facing the front of the car as I'm getting ready get in and leave. I hear a male voice say "Hey mister, can I ask you a question?" I thought it was going to be the driver of the pick up truck, hustling me for money because he can't pay for his gas. Without turning around, I get in my rental car, get it started and do a U-Turn around the gas pump island. I look to see who was going to hit me up for money and: the truck and trailer are gone. There is No One anywhere near the gas pumps. No cars. Nothing. I wish now that I had circled around to verify what I perceived. I had an opportunity to stop by that truck stop tonight and I asked the staff if they had any problems with panhandlers that afternoon and they said no. I'm not ready to say it was a ghost, but it was very odd.