The spider fell to the bottom of it's lair, its fall broken by the dessicated corpses of its past kills.  It has only enough strength to grab its web and hang on, it's home its only comfort as it dies.  You land on a corpse next to it and hear the crunch of bones.  Fortunately, they aren't yours.  Unfortunately, with a loud "RRIIPPP", you keep falling and land in the storm drain below.  As you stand, dripping wet and cold, your eyes adjust to the light.  Then you can tell that none of the corpses are of the woman and child.  You can also see that your fall didn't rip the web open.  It widened existing, fresh cuts enough for you to fall through with the corpse.  Finally you see them.  Footprints on the access walk that parallels the drain you're standing in.<br/><br/>Six-legged footprints, heading in the direction of the mall.  You suspect that whatever left the footprints, cut open the spider's web and stole its prey.