Hit the head

Today I was talking to PDaddy over lunch while Jack and his ears listened in. At one point I commented that someone had "talked his arm off." Jack gets this serious look on his face and says, "Man. That must've hurt." ((You just have to know Jack to know how very literal this child is.)) So, after a good laugh, I was explaining to Jack what a figure of speech was and telling him a few examples..break a leg, hit the hay....etc. So Sam says, "What about hitting the head...like I gotta go hit the head?" I said, "Uhm, Sam....that means go to the bathroom, but it's not the nicest way to say it." ((which means that Sam will use that saying whenever he can now that he knows it isn't so nice)) Anyway, as we were driving home, Sam says, "Mom. Pull over, I gotta break a leg." I was like, WHAT? So then it dawned on me...he meant HIT THE HEAD. Oh my. I just about crashed my car. I can just picture Sam at school trying to impress the other 7 year old boys and telling them that he is GOING TO BREAK A LEG as he goes to use the restroom. Imagine the perplexed stares that would follow....haha.