Hmm.. Nothing from my experience comes to mind, I don't understand it fully either.. Could somebody post any examples of this please ?
Typical example...
Girl is into you, but you're not really into her. She tries and tries to vie for your affection, asks you for get togethers, buys you things, offers sex, etc... You may agree to some but never fully commit or give all of yourself to her (Space). She wants you to herself fully so bad that she can't take it anymore and sends you an ultimatum email saying "I really like you but if I can't have you I need to walk away yadayada".
You're fine with it, you don't react to her test, you keep your cool, you're being what you were, you tell her that you understand and wish her all the best.
She comes back 2 weeks later saying "Sorry I got emotional, I guess if I can't have all of you I'll take what of you I can because I missed you and it sucks without you". She just submitted!