Funny signs!
Years ago when I was in real estate management as a day job, we had a shopping center that people would cut through to avoid various traffic lights. At the request of the city, tenants, risk management, et al., we put in slews of speed bumps to slow or stop some of the through traffic. One guy was speeding through, hit a speed bump and did LOTS of damage to his car. The insurance company requested putting up 'Beware of Speed Bumps' signs so we did. Then someone walked into one of the signs and cut their head.
That actually resulted in a short discussion about putting up "Beware of Speed Bump Signs" signs.