some of mine are:

look at queue times for theme parks i'll never even go to

make rabbit noises with my mouth (gotta be a rabbit)

grab on to something like a door handle or a hook, or something like that- and just shake it

walk in to the bathroom, make a couple of wiggling motions, then calmly walk out (for some reason it has to be the bathroom)

move my tung around my mouth
pretend that i've forgotten the alphabet (this one's weird)

it's like i'm talking to myself... hmm, i've forgotten what letter cake begins with

(long pause while i make thinking noises)

ah yes, a cake, begins with the letter C (or a curly cat)

that's how I was taught- curly cat and kicking king.