 If a spider walks under a P. schultzi female 's capture web and the vertical distance is less than 8 centimetres , the P. schultzi often drops on to the prey too fast for a human eye to follow . If the P. schultzi misses , it quickly returns up its safety line to its vantage point and looks for another chance - and seldom misses the second time . Most drops cover two to four centimetres , as longer drops are often obstructed by the web . : 36 
