8. My favorite is popcorn
You but two fists up and alternate flicking your pointer fingers up as if the kernels are popping!
9. Step-family terms (stepson, stepmother, etc) are all the regular words with the sign FAKE in front. I find that hilarious (if a bit insulting).
10. ‘I’ve got no idea / I’m really confused’ is mouthing ‘POWWW’ and shooting your index fingers back over your head (literally meaning that the information has gone over your head).