'Gin' in the Bible

The gin taketh him by the heel, the snare layeth hold on him;

And he will be for a sanctuary; and for a stone of stumbling, and for a rock of offence to both the houses of Israel, for a gin and for a snare to the inhabitants of Jerusalem.

Can a bird fall in a snare upon the earth when no gin is laid for him? Will the snare spring up from the earth when nothing at all hath been taken?