How can Buzz fly from the movie Toy Story?

The first Toy Story movie when Buzz first timed to meet toys after Andy's birthday gift, he showed toys to see he flew around the room. But when Woody and Buzz at Sid's house, Buzz tried to fly himself and he fell that his arm broke. The end of this movie, Buzz could fly when Woody and he tried to get in Andy's mom's car while they moved to the new house. How did Buzz fall but still can fly?|||He flew the first time because he landed on a racecar and went on a hot wheels track that made him get tangled in something hanging from the ceiling and then he bounced off a ball. It made him look like he was flying. The other time when they were trying to get in the car, he had a rockets attached to him to make him fly.|||He glided using the wind|||It's not flying; it's falling with style.

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