After the Kryptonian punches a hole in the pod, she wrestles for Loiss gun. Lois manages to fire the weapon at least once - so theres some urgency in the Kryptonian gaining possession. She does. But in pulling at the gun, she loses her balance and falls backward (assisted, it appears, by a modest kick from Lois). And with the pod doors closing, return fire was too late.
So some quick thinking - and a good amount of luck! - seems to account for Loiss survival. She didnt overpower anyone.
What was that description from? Is that the novelisation? Does it detail/ Explain the ideas behind the Physiology?