Post Apocalyptic Commando Shark (2018)
Synosis: It doesn't matter. There is some dude in a paper mache shark head fighting some other dudes and dudettes running around shaking fake gun props as if that's how guns work.
Rating: -10. It is not very often I come across a 'movie' that I can say nothing good about. I only lasted 15 minutes (and watched the ending). It is truly awful. Please don't watch it.
Survival lesson to be learned: none, except it might build up some tolerance to being tortured, if you manage to sit through it.