Depression
Just like any chart/graft of demand etc. whenever there's a state of growth, there will surely have a climax as well as a state of depression. Yea. Unfortunately, human do face this kind of dilemma. Maybe it's good, maybe it's bad. It depends. As for me, I must say, it's BAD. It's rather infectious! The whole atmosphere turning to be Zzzzz. =.='''