Conservation of mass Memes

The physics in this meme is about as solid as a quantum fluctuation in a vacuum! Pym Particles supposedly reduce distance between atoms (increasing density) without changing mass or weight—which violates basic conservation laws faster than you can say "thermodynamics." Then we see the particles being used to shrink everything from a tank to a keychain to a whole building. If density increases but mass stays the same, that tiny ant-sized human should create a person-shaped crater in the floor with every step! It's the perfect example of Hollywood physics—where conservation of mass is just a pesky suggestion that gets in the way of a cool shrinking superhero. Next up: perpetual motion machines powered by plot convenience!