Sharknado 3: Oh Hell No!

Though this isn't the strongest of the Sharknado films, it is a lot of fun, and it's a great party film, so well worth adding to your collection. It's also so packed full of cameos that it will take you a few viewings to spot them all. It doesn't have the great set of extras that accompanied the second film but it does come with the theatrical trailer. If you haven't seen this yet, save it until after the film so that you can enjoy its surprises in the proper context.