The wise one answers all your Spider-Questions.
Hey - great site - can you settle a dispute between a friend and I? Might seem inane - but how exactly are spiderman's web-shooters triggered? I claim a double-tap of the fingers is necessary, but the illustration your web page provides never really addresses the issue - just states that 65 pounds of pressure are required. Care to mediate?
You are correct that a double-tap is needed. Otherwise, webbing would spray everywhere whenever Spidey makes a fist!