Double act Puns

A long time ago, there was a family with a number of sons and daughters. The youngest son's name was Steven Prise. Because there were so many other brothers and sisters, Steven didn't get attention from the family. To get people to notice him, he had to jump into rooms and yell his name. The people didn't like getting startled, but whatever, it's poor neglected Steven. Obviously, that's no way for a child to grow up, and Steven was aware of that. He told himself that one day, he was going to make something of his life!

He grew up and moved out of the house to forge his own path. Lo and behold, he was able to invent a new farming tool that doubled the harvest. This made him wealthy and the king wanted to honor him by knighting him. They go through the process and the king told Steven that since he's a knight, he should act distinguished, so no more jumping into rooms. Steven begged and the king said fine, but only one more time. He waited for the best opportunity, snuck up to the door, slowly opened it just enough, and then jumped in and yelled, "Sir Prise!"

Orders a beer, a guy sitting at the bar overhears , he asks "what do you do for a living", I'm a plumber, I am currently working on the new building across the road says the duck, the guy says "I run a circus, I think you would be a great act,whatever you earn now I will pay you double to come work for me",the duck responds, what does the circus want a plumber for?