An Experience At Work

I had the WEIRDEST experience I've ever had at work last night. I was in the bathroom and I heard the door jiggle. I told whoever it was that would be out in a minute. Then they jiggled the door again, I said just a minute, and they said something. I walk out of the bathroom and there is nobody in the store. There were no cars in the lot, nor was anybody walking away from the store. I'm working alone, so it definitely want a co-worker.