We're out at a bookstore playing with the train set in the kids' section. Some boy (about 5-6) kept shoving O, just sort of trying to move him aside with a hip check. I was about to go and move my kid and give that jerky boy a stink eye when L zipped over from where she was reading a book and just loomed over the kid, silently, until he backed off. Like a bouncer or Secret Service agent.