My problems with Civil War

[The Fury]

d21lewis said:
*bonus* Ant Man changes size but stays the same weight and density. Wouldn't he be 200 pounds?

JWeinCom said:

3.  I'm really not sure if you're right about ant man's weight and density.  He regularly rode ants in the movie, so he couldn't have been the weight of a normal man.

A lot of the science in Ant-man was alway odd, he can shrink, punch as hard as a normal man due to the density thing, stand on ants etc yet when the Thomas the Tank Engine goes massive it blasts through a wall and digs into the ground. It would have weighed 50grams. :P