There are three ATMs in my bank's lobby, but all were occupied the other day so I hovered behind. A guy came in after me and said, "Which one are you waiting for?" and without thinking about it I said, "Next available." If only more lines worked that way. Two opened up as soon as I stopped talking, saving us a confrontation. I had a similar incidence at the drug store once that ended with a man shouting at me and every other patron taking a step back and pretending nothing was going on. I let him go ahead, it wasn't worth being shot over. Few things are.