Don't touch me

A lady caught me as I was lowering the curtain at closing with, "Excuse me, I was working if there's any chance I-" and I interrupted her with a polite, "I'm sorry, we're closed." because I knew exactly where this was going. She replied something to me, I don't remember what it was because I was trying to physically dodge the hand she was suddenly trying to put on my shoulder. I was startled. I don't know this lady, why is she trying to touch me?

She got offended. She shouted "Geez Louise!" while storming off, which gathered the attention of everyone nearby.

I'm not your friend. I'm an employee trying to close. We are strangers who have been talking for about 3 seconds total. Don't touch me. That's fucking weird.