Hi to Say Bye

Listen up, buttercup. This joke is all about the wordplay, see? The dude used "hi" to say "bye" 'cause the words sound alike. It's like when you try to build a Lego house and end up with a pile of bricks. You thought you were doin' one thing, but... surprise! You're just making a mess. Now go back to watchin' your cartoons.