rather than jumping on the goombah who cut off 05, it might be more productive for all the STMers to remember that you have to drive defensively on the road. too many asshats, you gotta protect yourself from them. after the sheet metal gets croonched, it doesn't matter a sh*t who's at fault, it's just too late.
here's a number for ya: average reaction time to go from driving along minding your own business to hitting the brakes and taking evasive action is typically 1.5 seconds (one of the reasons rally drivers left-foot-brake is that it cuts reaction time baisically in half) . Well, at 60 mph, reaction time means you travel 132 feet before you even have a prayer of missing the asshat.
At 30 mph that is 66 feet which is 4 car lengths. if 05 was "at least a car length away" there wasn't much room for error -- even if it was the other guy's error.
not trying to be a nag or your mom or your driver ed teacher -- jusx pointing out FACTS of why and how you got to watch out and leave yourself some room for asshats!