How his brother drives

I was recently riding with a friend of mine. We were coming to a red light, and he shoots right through it. I ask him, "Why'd you do that?" He tells me this is how his brother drives. We come to another red light, and again, he shoots right through it. I ask him, "Why'd you do that?" Again, he tells me this is how his brother drives. We come to a green light, and he SLAMS on the brakes. My heart nearly goes into my throat. I shouted at him, "Why do you do that?!" He replied, "You never know, my brother could be coming the other way."