J-fox
A J-fox is when you shake like a mad man who just saw a ghost. It’s when your body is trying to tell you that something is very, very wrong.
I did a J-fox during my math test because I couldn’t remember what 2 + 2 was and my brain started shaking.
My dog did a J-fox when he saw a vacuum cleaner, and it looked like he was trying to run from a monster.
I did a J-fox when I ate the last slice of pizza and realized it was just cheese and bread.