Kiernan, Aidan and Nico were playing with leggos on the floor.  Kiernan's mother was patiently explaining to him that she had to "run home to feed the baby."  Nico stretched on the floor and deadpanned: "Well, that's pretty silly.  You should take the car."  I could see she was still in that explaining-mom mode as started to say to Nico, "No, I mean . . . " but then she caught herself and broke into laughter.  

The other woman standing nearby also laughed and remarked, "Oh, he took what she said literally!"  

 I said, "Don't take anything Nico says at face value," but I could tell she really didn't recognize that Nico was joking.  I know she herself raised an autistic child and she works with special needs preschoolers every day -- so maybe it's not surprising that she took it that way.  We all build up our own filters to be ware of, I guess.