Just got back from a girl scout camp (and if I never hear "Let It Go" again, it will be too soon . . .)
Anyway, I got a real kick out of all the signs saying
because it was obvious someone came along with a magic marker and snuck in a tiny comma after the "slow."
This reminds me of the story of an army base where one of the officers was a bad driver, and the men altered the sign saying HALT. MAJOR ROAD AHEAD, by adding a comma after the word major