system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do things explode in a hydraulic press?

Recently watched the slow mo guys' video where they filmed a deck of cards under a hydraulic press, and I'm really confused as to why even something like a deck of cards explodes?
gpt
Explosions are just the result of pressure building up until an object can no longer contain them.  Think about putting air into a balloon - at some point, it will pop because there's too much pressure.

Everything has a breaking point at which it can no longer handle the stress placed on it.  Frequently, when this breaking point is reached, all the energy stored up in the object is spontaneously released in all directions, causing an explosion.