Big Boom

After a 1900s signal cannon bursts into the shop, Rick prepares for the big boom. Can he gather his troops to launch this field firearm or will this restoration offensive backfire? Then, the shop attempts to hold their first auction. Will they profit on this pet project or will they end up footing a big bill? And later, the shop says ciao to a 1950s Italian folding bicycle. Can they zoom through this bendy bike or will they get stuck on a steep slope?