This pair of rough animation drawings showing Doc and Grumpy make for a great "flipping experience"
When you flip one drawing over the other, positive change is happening. That's an Eric Larson term.
When Doc's head and body move upward, his hands change their positions slightly away from the body.
His belly moves downward, away from the head. The tip of his hat also changes direction.
The same goes for Grumpy. His spine goes from straight to curved, as his upper body moves forward a bit. The knees bend sightly to show the shift in weight.
You might want to print out these key drawings and flip them back and forth. For young animators this is the kind of stuff that can make a lightbulb go off!
For more on Fred Moore's dwarfs go here: