That all being said, the astronauts did note that the door appeared to bulge out when the LM was pressurised....
Was it Aldrin that had to "peel" the hatch open before dumping the PLSSs and other garbage before ascent? IIRC, they pressurised, stripped off the PLSSs, prepared stuff for dumping, connected to the onboard atmospheric unit, de-pessurised and then dumped the garbage on the surface. They then re-pressurised ready for ascent. IIRC there was a small amount of pressure left and Aldrin (again I think that it was Aldrin) "peeled" back one corner to equalise. The door was flimsy enough to allow this.
Also, I seem to remember reading about a technician puncturing the floor on a LM (or it could have been a boilerplate) when he dropped a screwdriver when working on it.