17. Maybe this doesn’t count, but the sign for lame (as in, can’t walk) is taking two fingers and stand them up on your other hand. Kind of like when you take two fingers and walk them like they’re legs? Well you stand them up on your other hand and them have them fall forward and lay on your palm.
So basically it’s a stick person falling over.
18. Make a C on one side of your head level to eyes and quickly make O O for each eye and end with L on the other side of your head for Cool!