Yup! When I finally turn music on, start singing, enjoying more catchy stuff, fantasizing about things, suddenly start planning things for no reason in my life, I'll know I'm gonna be in for a real good few hours! But I do notice more tension when this happens and if my "happy explosion time" is disturbed then I can quickly get really irritable. After the patch of hours is over I'll feel it like start to physically simmer out in my brain and I'll try to latch onto the good feelings but then the music thing will slowly stop working, my thoughts will start getting more disorganized again, and then I'll be thinking "well that's that folks!" as I slowly slip back into a mini crash like state for a while.