So, I had to stop by the grocery store on the way home to get one or two things. As I was waiting in line to check out, there was a guy ahead of me giving the cashier a hard time over how to use the credit card swipe machine. He said "I'm going to ask you one more time, what do I do now?" The jerk was friends with the manager cause he was all buddy-buddy to him and as he walked away, after successfully handling the complex time machine, told the manager you have to "keep their heads on straight."
What I wanted to say to this asshole was to give the KID a break. He gets shit from customers all the time and doesn't need some guy giving him shit because he can't work a machine that's functioned the same for years. If you want to be a dick, go home to your wife.
I used to be a grocery store cashier in high school and was always getting treated the same way, so I know what it's like. All I'm trying to say is be nice to the cashier if they are nice to you.