1. One should always take a rain jacket and/or umbrella to the Avon Descent.
2. It is equally important to remember to take said rain jacket and/or umbrella out of the car when you arrive at your destination.
3. A flimsy yellow rain poncho can, in an emergency, be used by two people if you are prepared to huddle close together on some very uncomfortable rocks and tear a second head hole in the poncho.
4. Although you will both get quite wet.