I feel bad for you, man. I've hit a very small piece of a gator in an Audi some years ago and it simply popped out one of the panels and scratched up the spoiler (non painted portion). A whole tire like that would total an Elise.
I have heard of worse. A guy I used to work with was behind a truck in Cal near 1000 Oaks in his 930 and a couch fall off the truck. He launched off the couch like he was Bo Duke. No body dammage to the car and he was able to drive it in to work.