Add a special feature for different items when put in the crossbow to make items more useful.
Plunger: when the plunger is shot it has a rope attached to it and it acts like a grapple hook that you can climb with
Rocket: it will ignite the rocket and make it do way more damage
Banana: when it is shot it will leave a peel on the ground that can stun monsters or players for a few seconds
Soda: it will act like a grenade but do normal crossbow damage with a larger hit area
Chicken Egg: The egg will shatter like shrapnel just like how the soda will act but it also leaves behind the egg yolk that acts like a banana peel
Whoopee Cushion: It will randomly fly around making a silly noise