Kinda embarrassing

I was going on a trip to meet my family and the drive to get there was about 10 or 11 hours, and while driving there I stopped at a small gas station cause I chugged about 4 mountain dews and had to pee real bad. When I went in the bathroom I couldn't find a way to lock the door but I couldn't hold it much longer so I rushed to the toilet anyways. While I was using it a random guy walked in but as soon as he saw me he stepped out and slammed the door. I was really embarrassed so I flushed and ran out the building.