Sharknado 2 - yes I watched it

Three Secrets That Made Sharknado 2 the Biggest TV Movie Ever

Why it worked for me:

• It was incredibly stupid but it was played that way - it was not intended to be taken seriously (unlike Jaws or Jurassic Park sequels)
• The actors played it as camp
• Al Roker and Matt Lauer and the ridiculous weather reporting : "sharks falling at 2" per hour"