It's Rock's birthday -- and no one needs to know he's another year older but him. Then again, that would mean missing out on Willy's birthday present -- Rock's favorite old pair of leather chaps, restored, refurbished and ready to go! Awoooo! Nothing makes you feel younger than leather chaps! Until they're sitting in two halves around your backside. Feeling overweight and over the hill, soon Rock's drinking prune juice and playing bingo from his recliner. Feeling responsible for his dad's slump, Willy decides a little Rock(y) style training should do the trick. Meanwhile, with Rock and Skunk busy playing shuffleboard, Serenity finds herself behind the wheel of a car, driving herself to the emergency room of the nail salon after a manicure mishap. Parking her car in the first available spot (the lawn of the police station) with a glove compartment full of unpaid parking tickets, Serenity lands herself in the slammer instead of the salon -- and ends up serving community service at a sen