I bet it would break. Either squish out or shatter like a rock.
These presses are amazing. My uncle was a machinist who worked on and repaired hydraulic press molds. They would use thick metal pins in holes in the top and bottom to make sure the two halves would align. Some times a pin would stick and stay with the top half. Not realizing this, someone would replace the pin on the bottom and work the press again, compressing two pins into the space one is supposed to hold. They use softer steel for the pins, but you still have to repair the mold when that happens.
