I gotta say, the trunk as a volcano idea is actually pretty neat... and the cannon one is too! Is it a reference to that Winnie the Pooh scene?

Actually, the cannon is just modeled off of the cannons in the 3DS games. (The volcano is based on an ability in Kirby 64.) Heffalumps & Oozels is totally the kind of thing I would expect myself to homage, though..

Interesting, I didn't know that since... well, I haven't really played any of the Kirby games, just watched some gameplay videos looking for certain things. Looks like I'll have to look some more!

Always loved toony stuff like that trunk cannon. Obviously volcanoes are my favorite to see stretching and squishing and all that, but honestly anything of that sort works too! Cannons, smokestacks/chimneys, pipes..

And I just figured it was a reference to that because I've recently seen some animations by someone else based on it.