A spider appears to create a cast around a broken leg with its own silk. A friend was putting it outside by trapping it under a glass, accidentally catching one of it's legs. We got a bit of a shock when it started to treat itself.
While camping in Ontario, Canada, my mate left his mixed nuts on a table. He kept finding the lid off and accusing us of not replacing it until we set up the camera and caught the culprit.They are very smart, if you watch carefully you can see the animal scan the area prior to sticking the head into the container