There’s one shaped like a rocket that I’m really starting to despise, because you can’t push it over easily, and even with Terence or Silver, breaking through enough layers to get at the pig in the middle while also knocking off the pig on the right edge is a tricky maneuver to pull off.
There’s one with a small balloon-supported platform up top and another solitary balloon with a tiny pig on it to the right that I’m really starting to hate when it crops up over and over again in the Arena, particularly when it’s way up on the top right.