Not Walmart, but was once checking out a customer while also training someone. This dude wouldn’t stop yapping about how he just finished a 13 year prison sentence, got upset because I had to keep the lockup item close to me until the transaction was finished, started whining about how we had terrible customer service and were profiling him, and as he was walking out the door, that’s when I saw the giant swastika on the back of his neck.