At the 1976 P.G.I. (Pyrotechnic Guild International) Convention in Grand Junction, Colorado, member Robert (Rob) Berk came up with the idea of connecting a series of firecracker strings together in order to make a "superstring".
During the 1976 P.G.I. (Pyrotechnic Guild International) Convention held in Grand Junction, Colorado, Robert (Rob) Berk, a member, came up with the concept of linking multiple firecracker strings into a single "superstring".