The whole debate is academic as the person behind couldnt stop in time either.
Had he stopped in time he'd still have got shunted from behind and had to give the car back damaged to the garage.
Maybe not - if Tom had been leaving his 2 seconds, he may have been able to come to a safe stop under his brakes alone - not a much faster stop under brakes + insignia. If that had been the case, Mr Mini, who didn't hit him very hard judging by the photos, may not have hit him at all.