What the hell is the point of stating that you're 100% Asian?  Or worse, naming your journal "15 yr old 'Asians' journal".....

That 'springy' feeling comes whenever you have adrenaline pumping/ blood rushing in your legs.  This usually can be achieved after some pick up games, but for optimal adrenaline, you need to be in a COMPETITIVE game where you play your hardest, and after 1~2 pick up games of these 100% effort games, usually you'll have your best jumps in my experience and those around me.