Calves both felt tight at the start of a long shotover run, but seemed to loosen up after the first bit. Then almost back home, left calf really seized up and I wasn't able to run on it. Walked home through south parks.
Think it was more of a cramp-knot than a pull/tear with lasting damage. Resting the one day and easy the next was good- did feel it after the easy though, so maybe two days off were in order!