Picture this: You’re spending a summer’s afternoon on Lake Minnetonka when a vintage red convertible floats by. The passenger smiles and lifts up a glass in a friendly greeting. Wait, what? Patti Soskin and her husband, Robbie, say the frequent double-takes are nothing new. For 30-plus years, the couple has spent summers in their cherry-red 1967 Amphicar, turning heads as they chug along Minnetonka Boulevard.