callous

Callous means hard-hearted: you can see someone being hurt, and you don't care. It comes from Latin callus, the thick, hard skin that grows on a hand after years of work. A callous person has grown that skin over their feelings. It is not one angry moment; it is coldness that has become a habit. In the animation, a man keeps reading his phone under his umbrella while the rain pours onto a crying stranger.