Give it two bucket ends. If a player jumps in one and then someone else gets in the other, the first gets fired into the air or something.
Some kind of cannon ball item that you can load into one end to fire the pirate cannon projectiles would be cool too.
What about two mount points.
The operator can shoot the projectiles
and the second spot is an optional ammo spot.
If someone is in the ammo spot, it shoots them instead of a boulder.
is this possible?
Also the operator would be a guy at the front who drives it like a car or whatever.