I had this happen last weekend. I was jumping a dolphin container that I just bought off the senior rigger and let this dude pack it that had only packed like 20 times. I don't know how to pack yet since I just started jumping 3 weeks ago and wanted to get back in the air so I just let him pack it. It came out when I was just screwing around flying on my back. I was at about 7k so I grab and I have no idea what I should really do. I keep my eye on my altimeter and flip back over at 5 and chuck it out and pull. It opened into a bad spin and I was like "shit, looks like i'm gonna have my first cutaway." Well I just grab my toggles and pull em down and it was just because obviously one of the brakes got released early. It was quite a rush though. The rigger is now putting secondary riser covers on just for shits & giggles since he said it was the packers fault. Makes me feel a lot better though. I'm thinking of just sending my dolphin in to get all the freefly friendly updates. I guess I'll see what I think about his secondary riser protection first.