Exactly the same thing happened to me.
Sat there in traffic, the car behind me was hit by a women doing 50mph car automatically went into me but kind of 'lifted' me off the ground as I had my foot on the break. It hurt, a lot! But his car got most of the damage especially from my exhaust and under car. Boot wouldnt shut proper though afterwards!
Thing was, the women had 2 mins earlier picked up her brand new car (52 reg then) and 'couldnd find the brake'....PMSL...its in the normal place love. The car that she went into had a towbar that had gone right through the engine, water everywhere and was declared a right off on the scene!! Made my day.
I had whiplash, so did my girlfriend and so did both of those in the car she went into, dunno about the women that went into us. However, non of us claimed for injuries, we just got on with it (she might have done, dunno). I had to though claim off the people that went into me that she hit, i couldn't claim off the driver that did the wrong cus she didnt hit me, the car behind me did.
Amazing how much of a jolt you get though, worst thing is your completely not expecting it.
By claiming for whiplash you are just making everything and all this' oops you slipped in the garage because you had stupid shoes on....why not claim' rubbish. No one seems to be responsible for themselves no more!