A security guard dragged me out of the bathroom at a gas station because I had buy something before using it

I was going to buy but I needed to pee so badly and this guy literary followed me to the bathroom and grabbed my arm before I could step in. ¡You gotta buy something first, go buy something and then you can come in! I went to grab the nearest thing I could (I just realized before leaving it was a chocolate bar) and then finally I could get into the bathroom and pee in peace. Fucking ridiculous man.