Olaf's Snowballs

Listen up, buttercup. This joke plays on words. It uses "hard" as in difficult, and "hard" as in... well, you know, the opposite of soft. And Olaf is a snowman from Frozen. And you probably don't know what snowballs are, but if you go outside and see yellow snow... don't eat it! You probably would though, wouldn't you, you simpleton.