"'ey! You! What's with the finger?"

The "dihydrogen monoxide" was supposed to be the alt text, but I figured I'd add it for that little extra.
It was almost just "dihydrogen oxide" because I wasn't sure what would fit in the word ballon.

I also could've jettisoned that pun altogether and went for Gold Oxide, Au₂O₃, which would've added Au to the mix, but then I would have had to have started with ozone, O₃, instead.

Well, I guess I could've done that, but O₂ is more common.