So, if a stranger slips on a banana peel and lands on his butt,

如果看到个陌生人踩到香蕉皮摔个四脚朝天
I might laugh because I'm not overcome by compassion.

我可能会笑因为我不用去同情
If he splits his head open and there's blood everywhere,

但如果他摔得头破血流了
I'm less likely to laugh unless I don't like him or something.

我就不会笑了除非我讨厌这家伙
And this is why the humor--

这就是为什么幽默
why the damage is often a certain sort of damage involving things like

为什么伤害一定程度的伤害包括诸如
embarrassment, sex, scatology,

尴尬性粪便
a banana peel, pie in the face, your pants fall down or something,

香蕉皮脸上的派裤子掉下来了等
where there's no real harm. So, empathy, caring, sympathy don't kick in,

这些都不是真正的伤害移情关怀同情心并没有发挥作用
but instead there's the aggression unleashed at somebody

反而是对他人释放了攻击情绪
and there has to be some level of surprise.

还必须在某种程度上让人惊讶
This is what--this is where the humor for that baby comes in,

这就是为什么婴儿会发笑