Miss Phang created a new term today:

The Jacqueline Syndrome:
defined as the cranky behaviour in Jac when she cant get what she wants/desires.

How to detect?
Easy.
e.g. You will hear phrases like "I'm upset, Im upset, Im upset..." or notice that Jac is pouting more than usual.

Please do not panic in the event of The Jacqueline Syndrome. Stay calm, don't keep a distant away from her and she will return back to normal after all the nonsense. It will help more if you try to be nicer to her when The Jacqueline Syndrome kicks in.