Hiking on a sprained foot is contraindicated as it will not unsprain the foot.
If someone at a barbecue asks you to keep an eye on the chicken, they probably actually want you to intervene should that chicken, say, catch fire.
It is inadvisable to soak your favorite plastic drinking cup in Zud if you are likely to forget the Zud is in it before drinking out of it the next time.
When in heavy rain, it is possible to use a large plastic trash bag as a raincoat, but be advised that the water will run down the plastic and soak into the legs of your jeans.