This reminds me of two things I think are sometimes forgotten:
1. You don't have to be far away to be in trouble. Had you twisted/broken knee, this would have been much worse. My worst scare was a slip which twisted my ankle and found myself limping a mile to me car in failing light. It was cold and wet - not exceptional but if the fall had banged my head or something, I'd have been stuck for a miserable overnight.
2. I agree with Norad - I always try to carry a shelter (heatsheet, plastic bag, poncho or whatever) along with brew kit (bouillion cube, metal mug, esbit stove, bottle of water, bic lighter). It's not a lot in an outdoor coat (and supplements my edc), but is a genuine lifesaver. I can't imagine a scenario where catching fish made the difference between life and death, but having to sit tight until first light or rescue sounds like a very probable situation