Didn't know where to post this but, nobody injured and all gear recovered. Those that skydive for a living, or just hang @ the dz all the time know that "student" or tandem suits are rode hard and put up on next load. It all started after we washed our suits the night before; then, did a couple of jumps (tandem) in this suit on my students. Big guy day. Well, no one noticed the hole in the tandems' suit just below his left shoulder on his back. While in freefall, the stray fibers pulled and wrapped around my reserve rip-cord which caused my reserve to deploy as well as my main at drouge release. (see fotos attached - please excuse fuzziness from the extreme close-ups) Exit, drouge-fall and the jump over-all was uneventful; but, as soon as i hit the drouge-release. the inch or 2 that the passenger dropped was enough to fire my reserve. my first thought was that either my lowers or leg straps went all the way out ( reserve tray was stuffed into the back of my neck ) but, i looked in front of me and saw my main ( A2 388 ) going vertically down in front of me. a nanosecond later i pulled cutaway and flew my strong master 425 down while stuffing handles into my student's suit. Now, this is not anything i would have ever noticed or thought to check. so, when it happened i was completely surprised, and felt compelled to post it here. - or wherever it should be on forums ;) edit to ad i was jumping a dual hawk Strong tandem, 388 A2 (main) with a( Master 425,reserve). decent landing under reserve Darwin's Watching!