Of course, there are magic zombies (Left 4 Dead), or super science zombies, ala Residence Evil (movies)- both of which are scary and could kill me outright. But, even those don't hold anything over a terminator. Girlfriend S is in love with zombies (more on that later), and we feel the need to bicker about which would be a more dismal future, a zombie, or robot Apocalypse. Lets have a side by size comparison:
And... one hour later i've decided a Left 4 Dead vs. Terminator match up is pointless- how can:

Match up to:

I rest my case for now.