During the Rube Goldberg effect scene, when the giant bowling ball doesn't roll, three squirrels climb up and Nikki the cat helps them push the giant bowling ball. Why didn't Flappie the parrot bird fly up and help them out since he could easily fly straight up to the ball and push it down. Which would've saved them more time and Nikki would've been able to get on the airship sooner instead of getting on at the last second.