Static line - student in tow causes in Gear and Rigging January 26 The static line was made of some heavy tubular webbing or something like that, good for likely thousands of pounds of load. Note that this was a direct bag static line setup, rather than static line extracting a pilot chute or whatever those systems were like. The student gear used an SOS system, so when the student pulled the emergency handle, it cut away the main too. The main canopy fell away at some point, rather than staying in the bag at the end of the static line. (What with the odd angles involved, I guess friction on the risers, despite being released at the 3-rings, could have extracted the canopy from the static line bag.) As for do's and don'ts, the obvious lesson is to close any main container correctly to avoid bad things happening (freefall or static line), and that any 'pin check' (such as by an instructor) look for proper routing of the bridle.