This is really not funny though. Sounds to me like this lady was up to something......perhaps she was given some "items" to take on this plane by her "friend" in Pakistan and place in the lavatory or hand off to another person in flight....when nobody showed up to meet her as planned (due to the apprehension of the London 24, which she may not have heard about) she pretended to act crazy to avoid suspicion. Remember that at least one of the London suspects took a sudden unexplained trip to Pakistan recently. And there were caucasian Muslims in the group that was arrested.
I believe the flight this woman was on was almost certainly one that the London terrorists had planned to blow up. The facts we have about her so far certainly can be fit into a scenario that makes her part of a London/Pakistan terror plot.