"We enlist the help of bystanders to help roll his body onto the stretcher." This is something I've wondered about a few times: if you're treating a casualty, would you want bystanders to offer assistance, or would you prefer to ask for help if/when you need it? I'm a "Johnnie", so I've got some relevant training, but obviously nowhere near your level so I'm a bit hesitant to interrupt LAS crews when they're busy.