If a pothole is too tall climb out of, too deep to do a partner assist, and too wide to throw a pack or sand bag over, then about your only option is use some sort of flotation. This is usually a packraft that is big enough for one person to stand on and from which a person can throw a sand bag over the pothole lip. Flotation is very rarely used to escape potholes but is a good option for couple of canyons.