I feel so robbed, I had an idea for a movie like this.
Basically eco terrorists and tree huggers allow uncheck evolution in the rainforest that allows the development of huge spiders.
Either hippie tree huggers or south american drug smugglers, I hadn't decided which, inadvertantly introduce them to Kalifornia. I also had a illegal immigrant introduction.
Anway to baby critters fully mature in their new liberal surroundings and begin wreaking havoc on the local Berkeley populous, who of course banned any practical means of personal protection long ago.
Scenes in my mind:
Berekley elite blasting huge spider with 10 rounds to no avail and screaming "Damn 10 round clips" as he attempts to flee.
House full of hippies under Aracnid seige, "Hey what happen to all those army guns we voted to get rid of?"
South Central Crips and Bloods spraying 10 foot hairy critters with Tec 9s to no avail.
AND OF COURSE...
The "slightly eccentric" former military guy up in the mountains with SHTF stores who is piling up dead spiders with serious firepower.
Coulda been good.