Close Call: Check Yer Toggles!
As I was packing today I had something happen that I hadn't seen before. So I figured I'd post a safety PSA for everyone. 
Stowed & set my toggles as I normally do & proceeded to pack. As I normally do, I pulled my canopy onto my container, lifted up the canopy and re-adjusted the position of my risers.
This time out of the corner of my eye I noticed something that didn't look quite right, and on closer inspection it turns out that my toggle, which is the pin/snap type, had unsnapped and the pin had come out of it's stow. So the only thing keeping the brake line in place was the pin through the brake loop above the keeper ring.
Needless to say, after I muttered "Holy crap", I restowed the pin, re-snapped the toggle and re-tensioned the brake line. But if I hadn't been looking all that closely I could have completely missed it.
My guess is that when I was pulling the canopy over to the container the toggle got caught on something and came unsnapped. So from here on, I for one will be double & triple checking the pins settings on the risers after placing the canopy on the container.