Caution, Drop!

Spotted this sign in a toilet. I found some websites taking up, and making fun of, this sign.

The other day I met two of my friends, who are going to study in the UK from September. For a moment I thought of asking them to send me some photos of public sign from the country, but I didn't do so in the end. I'd be better off getting along with English signs in Japan for some time to come.