There are many ways a pred and their prey can interact, both from the outside and the inside. Preds can also set up custom effects with Triggers using /votrigger.
By looking straight down and punching, the pred slaps their prey. Looking straight down and crouch + punching is a rub.
The pred can disable either action with /voslap and /vorub.
These map to the Slap Trigger and Self Rub Trigger.
Inside someone, prey can punch the walls or crouch + punch to struggle or rub.
Either the pred or the prey can disable these with /vostruggle and /vorub.
Prey can also see the pred's surroundings by entering spectator mode with /vospectate. The pred can disable spectating with /voghost allow.
These map to the Struggle Trigger and Rub Trigger.
/voburp and /vogurgle make your character burp or gurgle. These play louder for your prey./voswallow swallows the item you are holding and drops it into your stomach, where stored prey can pick it up./vomobeat toggles eating mobs, which works the same as eating prey.