Like mother, like son?

In our house, we have two bathrooms and three children. This of course means that there are times when a child has to stand in line and wait in order to use the bathroom. This happened this evening at bedtime. Our oldest was upstairs taking a shower, and I sent JC to use the downstairs restroom. I gave HT his nightly vitamin and then sent him to wait in line to use the downstairs bathroom after his sister was finished. From the next room I could hear her yell, "Keep the door closed!" I went in and reminded HT that he needed to keep the door closed and wait until his turn. He crossed his arms and announced quite sternly, "I am out of patience!" Gee, I can't imagine where he would have ever heard that before!