I don't understand how this slid so far down the challenge. I guess not all the tools got sharpened before they got put away. The image doesn't have a ton of pop, but the phrase is snarky as hell, a perfect de-motivator.
I finally got it when I was able to read the other comments. A real glass being a potentially sharp object didn't even occur to me. My own slogan didn't make sense to a lot of people either.