Wow, that was a hard hit, I bet the other vehicle got creamed. The past year I've seen more and more near misses. People, in general, have gotten really, really impatient. Earlier this year we watched a woman go off road, slam into trash cans and lose a side mirror trying to pass where there was 0% chance of making it. Even this morning I was tailgated HARD going 35mph in a 20mph zone. Sorry dude, I'm not giving you more than 15mph over because you're late.
Once every other day I see a near miss or someone doing hardcore weaving in and out of traffic (far more dangerous than any speeding) and daily I see EXTREME tailgating. Half a Mini Cooper's distance between you and the car in front of ya @ 55mph is just stupid. In no way can it possibly come across as even a decent idea.
I've been there in my much younger years. It's a wonder I've never caused a wreck or worse but now I'm seeing more people my age (early 40's) and older doing stuff that I did at 18, 20, 25 years old in a sports car. They're just doing it in SUV's/Trucks. Heck, I've gotten on to a little old lady or two in my neighborhood speeding while I'm just trying to walk down the street with my kids.
Plenty out there need to just take a breath and enjoy the commute. I leave 5 or 10 minutes early every morning so that I can enjoy some peace and quiet. Leave a tad early, drive defensively, your mood and day will be much better, and if your employer is going to complain about you being a minute or two late every once in a while, then it's time for a new job.