Are Newton´s asumptions really true?

Sorry if I ruined your fun in this thread. Maybe you should start another one, but this time make it something really stupid like Atomic Bombs not being possible or something like that. Be creative.

In 'Gravity' Sandra Bullock was floating in space and used a fire extinguisher for jet propulsion to get her to the the space station.
It ran out at the last moment so she threw it away and the opposite reaction pushed her the last few feet to the station like Newton predicted.
Clever girl..

Well, Zombies do exist and they ate people, it was in a movie!