This is a terrifying experience the first time it happens in a float center. A pump will seize, it's full of salt and there just seems like there's nothing you can do about it. Fortunately, this is one of those things that happens to pretty much everyone and it's not too difficult to take care of. 

Graham and Ashkahn dive into what causes a pump to seize as well as how to fix it. It's all here. Right now. Check it.