It's a feud between Bugs Bunny and Yosemite Sam where Sam always ends up facing a cannon that literally burns him into a living pile of ashes.
There is also a scene where bugs uses a small boat with oars and rows to a huge ship which is anchored in the middle of the sea or something.
Sam chasing bugs, swims all the way to the ship, takes the oars, swims back and uses another small boat to reach the ship. Or it was something comical like that. I wish to see it again. But I don't know how to.