Randy Cunningham: Ninth Grade Ninja is a popular TV series about a boy in ninth grade who is secretly a ninja trying to protect his classmates from evil monster. But what if that wasn't true. What if Randy Cunningham was a 5-year-old autistic boy with a strange tendency for playing with a small ninja action figure. Here's the theory:
Randy plays with a ninja toy almost all day for satisfaction. Thus, "being the ninja". Howard is the only person who Randy allows to play with the ninja toy. Howard doesn't let anyone play with the ninja toy; just like Randy. Thus, "knowing the ninja"