We refer to it as ground pounding and that is not in a cool way. I have only shot few birds that were crippled on the water in my 20 plus years. I see no sport in shooting a swimming, able to fly bird. I have in that time done a lot of jumps both in a field or on a puddle...they' ll fly just give them a chance to get up, to me more fun hitting a flying target. Please remember, if your shooting at a duck on water (cripple or not) make sure that nothing is behind it...them pellets can skip and cause damage.