Christians are on the look out… but in all honesty we do not really have an idea how He will come back.
We do have an idea when he will be coming back. Not a time, but in terms of a time line of events known as prophecy. As certain events happen that were foretold we know we are closer to the second coming. We also know he will not be reborn here, if he does come back in His body he will come back in His Resurrected body.