If enough of you watch a ridiculous TV movie just because it is called 'Sharknado', they are going to air Sharknado again. If you keep watching it, they will keep running it. They will make a sequel as well. If the TV movie gets numbers that are downright historical for the network, they will start considering putting it in actual goddamn theaters.
IT'S A TV MOVIE ABOUT A TORNADO THAT FLINGS SHARKS. ONCE WAS FINE. ONCE IS AMUSING. OVER AND OVER AGAIN IS NOT FINE. WHY ARE YOU DOING THIS TO YOURSELF.