I hate it when they cut up vegetables and there's extra bits that you can't eat, so you stand there thinking "What am I supposed to do with this wheelchair?".
What is your intention in joking about people with mental disabilities?
I can tell you my thoughts behind it. What I meant was physically disabled people are vegetables.
People with disabilities are still really good people and you shouldn't make fun of the hand they were dealt in life. Its not their fault what happened to them and they just want to belong.