system
Given the following post, respond as if you're commenting on Reddit:
human
[marvel] how does Caps shield cut through tanks but also bounce off bricks?
gpt
It's the amount of force he puts behind it and how he uses the shield .

When he's throwing the shield, he isn't using his full strength because he *wants* it to bounce. When smashing the metal on a tank, he's using his full strength.

Think of it this way, if thrown softly enough you could bounce a baseball off a window. If thrown with full force it'll go ~~strait~~ straight through it.