Had a nice day fishing at my local spot. Parked the boat at the dock, walked up to get the truck and backed it up down the ramp. Set the parking brake and walked down to the boat, untied and started to drive it to the submerged trailer. OMG! The reverse lights were on! I could just see myself as one of those FAIL videos on Utube. Re-docked and ran as fast as my 60 year-old legs would carry me and put her in park. WHEW! Thank goodness for working parking brakes.