DON'T BARF IN THE BACKSEAT! Billy and Frecks know that anything can happen inside Grumpy's Garage. But when the two best friends join Grumpy for a simple errand in his prized '42 Chevy, an ordinary summer afternoon turns upside down ... literally! What starts as a quick trip soon spirals into a zany adventure packed with top-secret inventions, experimental jelly beans, and a close encounter with an escaped artichoke! Tucked inside the sci-fi fun, you'll discover real World War II history, classic military aircraft, and even surprises featuring aviation legends Amelia Earhart and Chuck Yeager. Can Billy and Frecks keep their lunch down while Grumpy's latest contraption takes flight?