Because there he is.

I'll tell you why, because you're yellow.

MAN 2: I don't know. Because it's scarce.

...because construction engineers examine every bit of ground around the road...

Couldn't be because you're scared after you've been shooting your mouth off?

Bandits get big surprise because soldiers on the train waiting for them.

...anybody works on a salary wouldn't go because he wouldn't risk his hide.

Glad to hear such tall tales because that means few outsiders have set foot there.

The gold is worth what it is because of the human labor that went into finding it.