Quote from nutmeg:
I used to own a second run movie theater and had a buddy that worked at a an assisted living home for adult tards. Sometimes he would bring a couple of the guys from the home to see a cheap movie and one night he brought a couple of these guys in when we had Something About Mary playing.
You might remember that Cameron Diaz's character has a retarded brother in the movie. When this retarded guy came on screen and started talking one tard turned to the other tard and said to him mockingly, "That's you."