system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] How come Ant-Man's strength doesn't change when he shrinks, but he grows stronger when he gets bigger?

In the Ant-Man movie, they go into detail about how shrinking doesn't actually make you smaller, it just reduces the distance between your atoms (or something), so as a 1-centimeter tall man you can still punch with the force of a 200-pound man. This is why Ant-Man can still punch Falcon and send him to the floor while shrunk.

So how come when Ant-Man transforms into a giant, he gets so much stronger that he can tear apart airplanes and throw shipping containers? It's not consistent. 

And also, why do Ant-Man and Yellowjacket spend so much time throwing toy trains at each other when they wouldn't get hurt by them, since they are still regular-sized people in terms of strength, and Yellowjacket was even hit by the train when it ran him over and it did nothing to him?
gpt
Short answer: It's the Pym Particles. Not even Hank Pym can explain it.

Long answer: Hank was bullshitting Scott on how the Pym Particles work to prevent Scott from leaking it to Darren Cross on the off-chance Scott decides to defect.

>why do Ant-Man and Yellowjacket spend so much time throwing toy trains at each other when they wouldn't get hurt by them, since they are still regular-sized people in terms of strength, and Yellowjacket was even hit by the train when it ran him over and it did nothing to him?

It's a distraction. They're throwing toy trains at each other because in the heat of battle, they subconsciously think the train carriages are tons of steel and wood instead of plastics poorly made in China.