If your duck hasn't been thrown before and has little or no experience flying, then mean or nice, I probably wouldn't do it just to post it on YouTube. It's great if it works out, but would really stink if you injured your duck. A duck landing in water is also much less likely to cause injury than a duck landing on the ground. The bigger the duck, the harder the landing on legs that really weren't designed to absorb a lot of impact. Domestic ducks that can fly a little have some lift from their wings that gives them a gentler landing than a duck suddenly thrown without knowing what to expect and that may or may not get some lift from its wings befor hitting the ground.