The acting isn't terrible given this ridiculous script. I don't know how you mutate a venomous snakes venom but apparently I'm doing so five snakes miraculously turn into hundreds of fully grown vipers. And apparently these snakes eat people in bites like a canine or lion or bear.
This movie would have been better had they not tried to amp up the situation by turning to the ridiculous. The Pacific Northwest is not known to be a haven for snakes since it is quite cold there.
Finally, the budget on SFX was abysmally wasted. The digital snakes sometimes move like a snake would but more often than not the snakes are just too damned fast and (especially ridiculous) move in a linear manner like a child's toy being pulled on a string. Oh yes, did you know that dying snakes cry out like an injured dog? Neither did I.
There are points where you can see how it might have been better, but more often than not it's just laughably bad.
