What's this? A huge traffic jam? But everyone's in a hurry! There's the family in the paneled station wagon (brrrm, brrrmm), packed to the roof rack with gear for the beach. There's the be-hatted Duke and Duchess, out for a drive in their ornate Rolls Royce (whisper, whisper). Not to mention a yellow school bus bursting with kids in beanies (chug, chug), an overheating race car (bang, hissssss . . .), an ice-cream truck ("Mamma mia! My ice cream is melting!"), and other vehicles revving to go. Who -- or what -- could be holding them all up?