He is correct about the G-Force lol. In space, your almost always going to be affected by gravity as well, no matter how small it is. Astronauts don't seem to experience gravity because they are actually in constant freefall when orbiting the earth, and when they traveled to the moon, they too were in freefall, yet their momentum was enough that they were able to float for extended periods of time (like the time required to break earth's gravity by having the moons gravity overpower it.), ultimately getting far enough away from the earth to where the moon's gravity had more of an effect, and they more or less were freefalling towards the moon then.
But abrupt changes in speed, which more or less means changes in acceleration can cause you to feel G-forces.



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