We were coming to a red light

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."