In the midst of the uphill battle to finish the Liberty Bike, Paul Sr. proposes a downhill adventure, a spontaneous snow tubing trip. Back at the shop, the pressure mounts as Paulie realizes the bike's exhaust doesn't fit.

When the gang visits the Dixie Chopper company, makers of the world's most powerful lawnmowers, Paulie comes away with some cutting edge ideas for the latest bike. Spinning mower blades incorporated into the wheels & a real chromed-out mower engine.