After the door opens, she does exactly as the drone had done and removes the cylinder from it's place.  Assuming the door stays open for them, she'll head inside and then approach the man that looks slightly bewildered.  "Hi, you work here?" She figured it was a good a question as any, though she does keep an eye on him.  Should he run to get to a switch or something, she'll try to get in around him and stop him from getting further.