[tutkarussia]

This may sound silly but could it be Gabriel blowing his horn? And, I don't say that with tongue in cheek either. Stranger things have been seen when viewing the future, as did John. When he told us of the Four Horsemen of the apocalypse, I don't think he really meant actual horses with men astride them, for he had no other reference point from which to describe his vision. Something to think about.