The shaft was the only one with direct access to the residence floor. Frustrated, she slammed her fist into the door. The metal buckled. She hit the door again and a gap appeared between the two panels. She dug her fingers into the space and pulled until she forced the seal. As the pressure lock released, her strength proved too much for the structures. The left panel buckled and jammed, while the right folded and slipped out of its track. She flung the useless thing behind her.