t.b. Don't let him scare you. See the first post of this thread. It's an offense to open a car door without due care so that it endangers another road user, let alone actually causing them harm and/or damage to their belongings. As Ojeffcott says, if he waited till you were 1 ft in front then it's difficult to see what you could have done about it. CCTV footage would only help your cause at this point, so definitely try to get a hold of it. He's likely calling your bluff saying he'll call in CCTV footage to prove his point so that you'll drop it. Don't. It's not acceptable behaviour.
t.b. Don't let him scare you. See the first post of this thread. It's an offense to open a car door without due care so that it endangers another road user, let alone actually causing them harm and/or damage to their belongings. As Ojeffcott says, if he waited till you were 1 ft in front then it's difficult to see what you could have done about it. CCTV footage would only help your cause at this point, so definitely try to get a hold of it. He's likely calling your bluff saying he'll call in CCTV footage to prove his point so that you'll drop it. Don't. It's not acceptable behaviour.