If you see someone deeply wounded, great suffering, you might just help out of empathic distress -- you can't stand it, so it's better to help than to keep on looking at that person.
如果你看到有人受伤很严重，非常痛苦， 你就会出于同理心而伸出救援之手—— 你无法承受其伤痛， 与其冷眼相看，不如上前救援。