This is one that I took a while back but forgot to post.
We were at Wal-Mart when I noticed this sign in their photo lab. What’s wrong with it? Try telling me how long it’s been up there. Do I need to wait 30 minutes for someone to come back? Or did they hang it up 29 minutes ago and they’re walking back right now? There is no way to tell.
A simple timestamp on the sign would do the job. Even better would be a sign that says something like “Photo lab will be closed until 8:15pm” or something like that.