As we saw earlier, the dragon gestalt is composed of 4 progressions and three turns or changes of direction. These correspond to the three acts, with the second act being twice as long. (Remember, a gestalt is an emergent property that's greater than the sum of the parts.)
We're mapping both the ups and downs of the character along with the hopes and fears of the audience over time.
Here are the four progressions of Back to the Future:
Marty has been hanging out with the dangerous Doc. We know he's dangerous because Principle Strickland tells us so. But we see just how dangerous he is right in the opening scene- he's stolen plutonium.
Doc's actions cause consequences. The terrorists don't like being tricked so they kill him. Marty narrowly escapes in the time machine back to his past in 1955.
In the past Marty disrupts the flow of the space time continuum changing the future. He saves his father causing his mother to fall in love with him. And he beats the bully Bif.
Marty tracks down Doc and learns he's stuck in the past because you can't buy plutonium at the local 5 and 10. (For those who don't know a 5 and 10 store referred to stores where you could buy things for 5 and 10 cents. I guess it's equivalent to our current dollar stores. But even they don't sell plutonium) The consequence of this is that his brother and sister are starting to disappear from existence, this is shown by the visual icon of them fading from Marty's family photo.
As Marty is beginning to lose everything, in the manner of Alice who worried she's going out like a candle flame. Doc makes a plan, which is BRILLIANTLY demonstrated by the use of a scale model. It shows us exactly what's at stake. The model car drives through the town and connects with the lightning bolt at a scale speed of exactly 88 miles per hour. (Ever wonder why 88 miles per hour?) What's brilliant about this scene is, not only to we see what the plan is with no dialogue needed, but we get to see what could happen if things go wrong- the car bursts into flames. A second plan is made where Marty will get his father to take his mother to the dance and have their first kiss.
Marty gets his parent to kiss.
Marty prepares the time machine while Doc has to deal with obstacles of getting the wiring back to the clock tower. The plan works and Marty is sent back to the future. The doc is saved and his family has changed for the better.
Here is it mapped on the dragon. (CLICK TO ENLARGE)