Just like the subject says...? I have Rigging Innovations risers / toggles that have "keepers" for both the top and bottom of the toggles (those elasticized hoods). Every once in a while the bottom or top on one side will release / come free on opening. No big deal, I guess, as everything else stays. I always set brakes / stow excess. Thought "maybe I was doing it wrong (I'm not)" and have had the packers set the entire system for me. Same results. With increasing frequency it seems. Risers were brand new in the summer and have ~150 jumps on them. Gonna have them looked at this weekend at the loft.
But the point: was doing a night jump on NYE and looked up after opening and both of the bottom end of the toggles were out of the keepers. The tops were *barely* in the hoods. Like *barely*. Excess was stowed. I don't routinely grab my risers on deployment...didn't on this jump.
So...outside of a very, um, "brisk" opening what should one expect? I assume a dual release that is asymmetrical (one before the other) would be worse but a simultaneous release would be just as concerning and speedy.
I've had brake fires before on rental / demo gear (oldish risers, since replaced) etc so a single-side fire is something that I'm generally familiar with - on rather docile canopies (large pulses, large storms).
Just had a full inspection / repack two weeks ago and everything seemed kosher...