He Was Tailgating Him, Then He Got A Lesson He Won't Forget
If you thought that tailgating is an efficient move to get other drivers out of your way, you best be prepared for when they do something that's probably even worse: brake-checking.
It's never a good idea to do any of these things - tailgating or brake-checking. You could argue that the second one is a lot more dangerous and that the best way to avoid any type of conflict when somebody's right behind you, is to move out of the way.
See how Honda driver infront of cammer dealt with tailgaiting.