Painful morning.
I stepped off of the loading dock at work(I work at Portland State University's mail room)..about 4 1/2 feet straight down onto the pavement.
I was walking backwards,about to grab one of the carts full of mail & packages that the post office had just dropped off.
(Basically,imagine stepping off a ladder,and missing a couple of rungs as you step down..that's how I fell.Straight vertically down.)
Twisted my right ankle (still hurts a little bit,even though this happened about 4 hours ago..maybe 8:20 AM or so.)
This wasn't a traction issue..(I don't think wearing my Whites boots would've helped,since I just misstepped.)