What happens when you're really over-encumbered?

[Gaudia Certaminis]

I was recently staggering around with 40kg of gear, and my character was not happy at all. I dumped the excess before I came to any harm, but what would have happened if I'd carried on? Do your ankles snap? Hernia?

[Doc Feral]

You walk slower, get tired faster and probably consume more calories. And beyond a certain weight (don't know how much, but the character starts to complain about being barely able to move, I think it's around 45kgs ) you can't run. Around 58kgs and more you'll be immobilized.

[Spakerman]

the numbers change a bit depending on whether you have a moose satchel or not.  Generally speaking... passing your carry weight has a progressing slowing effect with each additional kg. At 10kg over your carry weight there is a significant jump in the speed penalty, around 15kg over carry weight you lose any ability to sprint, and around 20kg over carry weight your movement speed is reduced to a crawl. At ~25kg over weight you can no longer move beyond inching along.

When over your carry weight I believe you have greater chance to sprain ankles and wrists with each step.