A friend of mine told me that I would get an Achievement if I managed to lick the plane that's flying around in the world but, he won't tell me how to get close to it.
I tried many different things. Jumping on trampolines won't get me high enough, and the only thing that looks high enough is the crane, but I somehow can't jump that far when the plane (or... glider? I don't actually know what it really is.) shows up there.
How can I lick that thing, and what is the achievement I can get from it?