American Restoration S04 E04 Restoration Wipe-Out

When a 1970s Wet Bike, an early version of a jet-ski, cruises into the shop, the client raises the stakes by offering Rick and Ron a tidy sum if they can ride the restored rig. Can the brothers make it rain or will they wipe out? Also, returning customer Darius brings in an item unlike anything the shop has ever seen: A World War II era bomb.