# File Springz.rb, line 305
        def remove_thyself
                @@all.delete(self)
                @@lookup[@o1].delete(@o2) if @@lookup[@o1] 
                @@lookup[@o2].delete(@o1) if @@lookup[@o2]
                @@objs={}
                @@all.each{ |s|
                        @@objs[s.o1] = @@objs[s.o2] = 1
                }
                self
        end