Tomato horn worm moth. It's larvae are those hotdog size worms that strip tomato vines overnight. Use the knife on the beast before it lays any more eggs.
I also have on of those small Gerbers that I carry on occasion.
Yeah, that's what I figured it was. I hate those huge green worms. There are worse worms on your tomatoes, though, since the tomato worms are pretty easy to spot, and tend to leave the actual tomatoes alone. Just a matter of checking a couple times a day till their season is over.
