Other mistake: Dennis Quaid is supposed to be frozen in a wall of ice but if you watch closely, and very quickly, you can see him blink his eyes.
Factual error: After the giant egg 'cracks' open on the ground below, Atouk and his men move in for a closer look, and then begin eating the contents. Seconds later the black caveman slips and falls into the "yolk" and then begins dancing around as they cheer him on. When in fact, the boiling steam would've burned him.
Continuity mistake: Atouk takes a white pumpkin from Gog and throws it at the dinosaur. When it lands on the dinosaur's horn the pumpkin is orange.
Visible crew/equipment: After Tonda forces Atouk to eat the flower's fruit (looks like a radish) Atouk gets dizzy, and when he falls backwards the corner of the grey crash mat can be seen on the grass, at the bottom of the screen.
Answer: The music playing while they are carrying the giant egg is from, "The Bridge on the River Kwai." It's a classic World War II movie, soldiers marching into a Japanese prison camp are whistling that tune.