Nice work, for the text question mark maybe make it rotate a bit, and change sizes each time the font changes to give it that crazy shaky look. Just makes sure you can still make out that it’s a question mark though.

It’s just the movements really. Try and think ‘what would I do if someone pulled out a knife’ would you stand there or get into some kind of stance with your hands up backing away or a stance ready to run away. Making the characters feel more natural and their movements.

As I said before, just use references, it will help drastically.