I really don't understand this 'suing' thing for this accident. You said you walked away from the accident, pretty much no worse for wear. What exactly are you going to sue them for?
If you didn't break anything, didn't suffer anything long lasting, you're pretty much SOL.
And heaven forbid you win for a freak reason....you could actually end up killing someone long term. (think standards for air bags change and they go off even in accidents where they in no way should, turning into snapped necks, etc)