Some of the easier ways to make a new entrance that came to mind were to sacrifice a truck by ramming it at the external wall connecting to this particular area, get through sussily by using the vent system, blowing up a portion of the wall that's non-load bearing, or in the same realm with using explosives, just blow the existing door altogether.
In any case, a sledgehammer to the wall also came to mind but before we could enact upon our barbaric methods, we finally heard a reply.
"P-Please prove that you're real!" A gentle, womanly voice resounded.
'Real?'
"Huh—"
"GET BACK HERE, REGINE! WE DON'T EVEN KNOW IF THE EXPLOSIONS WE HEARD WERE REAL!"
"The ground was shaking, George! How can they imitate that!?"
'What are they talking about— Oh… That's— Huh.'