All the animals – including ferocious lions and tigers – broke free from their enclosures at Edinburgh zoo. Fortunately I was in complete safety, high up in the cabin of my red tractor.

However, my fortunes changed when I later took a walk along the side of the canal. There  I came face-to-face with a marine stegosaurus. I screamed, turned on my heel and ran – and counted myself lucky to escape with my life.