This one doesn’t really make any sense. Cyan is hot and he wants some water but they don’t give him any? That’s not really funny.

You can see Magenta’s mouth open here. There are two kinds of Grumbles. One has a mouth drawn on their face, so that when it opens it is just an oval or whatever. The other has a mouth that is drawn connected to the edge of their faces, with an overbite or underbite. The first type is more common. Sometimes they will turn into the second type when they yell really loud or something. The Grey Grumbles are all of the second type, even the ones based on ones who are not. That’s because they never close their mouths and they have big teeth.