Oy! You knowz 'ow it workz: "'nock! 'nock!" "Oz dere?" "WAAAGH!" "WAAAGH-hu?" "WAAAAGHon smashin thru ya wall!" Though personally, I would find a suitable "PLOP" sound when an ork vaults through a window very amusing.
Is an empty hole in a wall really considered a door anymore? Thats like saying an open air pavillion at a park has 4 massive doors.