Excellent situational awareness and use of the pre-emptive draw from AIWB.
He saw a potential threat and covertly drew his handgun in anticipation of trouble, and it probably saved his life.
My only criticism is he should have either got in the vehicle faster or circled around the front of the vehicle as they walked around the back, keeping the vehicle between himself and them.
He hesitated watching them and was almost cornered in his seat with the door open, bad place to be.
http://www.liveleak.com/view?i=fbe_1427557181