Midwinter wrote:
MAKE SURE THAT YOU DO NOT HAVE ANY LOOSE ENDS ON RUCKSACKS THAT MAY CATCH THE CHAIR OR THE LIFT SYSTEM.
For example, board leashes. The Devil's own work. I have been caught by a board leash in my youth and more recently a lose strap on my backpack. Ultimately the strap lost to gravity, something at which I excel at.