Wow, congrats on dodging that bullet. I've got some of those plastic-hook bungees, but I've got safety concerns with them, too--te ones I've got are adjustable, and the elastic cord tends to work it's way loose and finally slip out, leading to a flying loose cord. Not nearly as bad as a metal hook, but no fun, either.
I try to keep my head away from the likely cord path whenever I'm stretching the things. Kinda like an arresting cable on a carrier deck--plan for failure and don't be in the way.
Stay safe out there!
"Freedom begins when you tell Mrs. Grundy to go fly a kite." - R. Heinlein