What’s your worst interaction from guests? Just curious. (My worst interaction below)

So as the title says, what is your worst interaction with the guests at CFA? My worst interaction was doing DT and one customer looked straight at me and said sl*t your throat and kill yourself. I was shook for the rest of the order, but the customer besides looking mentally unstable didn’t have any weapons I could see. It’s one of the worst customer interactions that I’ve had, but have told almost no one save family and close friends, As I don’t want to damage CFA’s brand reputation. ( don’t worry management was notified, but the person didn’t have a license plate so idk what happened after)