Like other base models, WAN seems to really bias things towards happy / neutral expressions. This makes for pretty awkward renders when the action doesn't really make sense with that, but everyone's smiling the whole time.

I made this helper to facilitate more sensible facial expressions and body language with emotionally negative action. It works best when matching the rest of the scene, but definitely sems to avoid the weird tendency of the model to have people pantomime negative emotions without expressing them.