I never have what people call a "bad" run. Sometimes I am tired or just not feelin' it, but it's hardly ever bad. Yesterday, I forgot a jog bra and decided to try it out because I just wanted to go for a run...MISTAKE! The poor bikers, walkers and joggers that passed going down hill I'm sure even more than normal I was quite a sight to behold...HA! Note to self, NEVER give it a go again no matter how much I think it's okay, Cripes!