afew years ago I got hit in the rear by someone doing about 40 while i was stationary. The car I was in had a rather elaborate towbar and most of the force was on that. Needless to say it bloody hurt! Proper whiplash is a complete pain and inconvienience and should be enough to put anyone off speeding in its own right, let alone anything else. Alot of people speed from time to time, its the prunes i see whizzing about in built up areas that wind me up.