As she continues down the tunnel it begins to thin.  She rounds a corner and finds that the tunnel seems to come to an end.  It's then that she feels some of the webbing shift beneath her.  The web holding her up gives way, her feet falling down until the ground was at her shins before the webbing supported them again.  She could hear the scurrying spiders, and looking down she could see them flowing over her feet and legs, laying more webbing and trapping her boots.