Most of my posting is by phone. But I need to study a bit before we get too far. The light source and tunnel<div class="quoteheader"><div class="topslice_quote">Quote</div></div><blockquote class="bbc_standard_quote">shape let you see them before they see you. But the elemental is in front which impedes that. You can certainly hear them grunting and panting and they have diminished awareness. Final answer formulating </blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>