You don't mess with a boy's train

Jonathan and I were upstairs in his room...he was playing, I was putting away his fall/winter clothes. All of the sudden we hear his train start downstairs, Kaylin turned it on, and Jonathan runs out of the room screaming "NO! KAY-LUN NO!" It was especially funny, because he always calls her sissy. Apparently, if you mess with his choo-choo and he doesn't play nice anymore.