Hello, Looking for assistance in physics analysis of these 2, short, movie scenes from "The Martian" (2015). Here are the 2 YouTube videos and some questions regarding these scenes. What are your thoughts?

https://www.youtube.com/watch?v=vC_r-0X_vhE https://www.youtube.com/watch?v=YAPUVhAS8UQ

Questions: What did Jessica mean when she said to Matt 'you will experience some serious G's on you'? Why did Matt pass out after the launch? How did Jessica control her motion? Why did Matt slice his glove? How did he use it to launch himself out of the vessel? After Matt collided with Jessica, what happened to their motion? Why couldn't they stop themselves from spinning? What if this happened on Earth?