The problem of inception crossing the third and fourth floors.

You have lost some links. In fact, in your dream, a * * * extends to the fifth floor. Now restore it:

1. The first dream, Yusuf's dream, the environment is a city, and trucks hit the guardrail of the bridge and fell into the water.

2. On the second floor, Arthur's dream, the environment is a hotel, and the elevator falls to the ground through the explosion shock wave.

3. Ames' dream and environment on the third floor is a fortress in the snow. The pillars that blew up the fortress fell down and were electrocuted.

The dream owner of the third-level dream is Ames, the pretender (Fisher was tricked into thinking it was Browning's dream). On this floor, the environment is further simplified and Fisher's subconscious defense is stronger. After Cobb learned from the dreamer Ariadne that Ames had transformed the environment and designed ventilation pipes as a shortcut just in case, Cobb's demons, that is, the shadow of the subconscious, appeared, hurting Fisher, and brought him into the dream they had built and lived together for 50 years, luring Cobb into it.

4. On the fourth floor, Cobb's dream and environment are dilapidated cities, and he crossed by falling off a building.

Because of a sudden accident, Ariadne only built three levels of dreams, and Cobb was convinced that Mel killed Fisher in the third level of dreams in the hope that he would meet himself in the next level of dreams, so Cobb restored the dream he had built and lived with Mel for 50 years to the fourth level of dreams (Cobb was originally a superb architect). Cobb, who got rid of his demons, traded himself for Fisher from Mel and asked Ariadne to push Fisher down a tall building to cooperate with Ames' electric shock.

5. The fifth floor: lost territory, chaotic environment, passing through death.

In the fourth dream, Cobb and Mel spent 50 years of happiness, and finally both of them died of old age, thus becoming the first two people to fall into the realm of loss. Only through death can we return to the real world here.

So to sum up: Fisher was first injured by Cobb's demon (that is, the shadow of the subconscious), fainted and was taken to Cobb's dream on the fourth floor. He was pushed from a tall building and passed back to the third floor with Ames' electric shock and woke up, thus advanced back to the real world.

I hope reading this will help you.