Is this a good Idea for a start of a horror movie?

Okay my cousin is going to film this part tomarrow out in the woods but I need to know if this begining I came up with is good. If not please add on to it. Okay 2 couples (Jake,Lanessa,Jenny and John) stay out in a camp site. When everyone else leaves Jake stayes outside letting a Deformed Mutant cannible snap his neck. Then the girl goes outside and the cannible starts to make noises everywhere messing with her head giving him a chance to strike with his axe. Then the other couple goes out and hears the noise as well. The girl sees the cannible behind her boyfriend which he chops of the head. Then I dont know what to do next. What should the girl do. Help Me please