Bizarro in camera effects (AKA More trifecta stalling)

I as going through my Trifecta pictures trying to get something together when this one caught my eye. Check out how Mason Huggin’s right foot looks like it’s being severed by his board. I swear to you this is not photoshop trickery, rather the result of some weird flash effect. All I’ve done is adjusted the levels slightly, and obviously cropped and resized it. I’ve included a full size close up of the foot in question, It looks totally doctored, but it isn’t.