I've been stuck behind a fully stopped freeway that was cleared for a life flight!
I was involved in the life flight once, even if peripherally.
Me, my exGF, another friend and a bunch of acquainted riders did a group motorcycle ride one weekend, some years back. At one stage, out on a country road, we came across a crash scene - a rider down, not moving, unconscious and barely breathing, a heap of cars stopped, nobody doing anything.
Ex and I were both nurses, and we worked medical rescue at motorcycle race events for about 5 years too, and had done some relevant accredited courses, so we sort of hopped in without even thinking about it and took control. We had someone call the emergency number, someone cleared the road, a couple of the guys did 'safety duty' warning oncoming travellers, somebody else took off to find the group the crashed rider was from.
We took control of the rider until the professionals arrived - and longer... the local ambulance driver turned up alone, his partner was off on a different call. The police beat him by about 30 minutes - and kept asking this barely conscious (and certainly not lucid) man if he'd been drinking or speeding. Two hours after the first 000 call, the helicopter turned up. By this stage the rider was nearly lucid, he had some obvious fractures that I was supporting, but he was fairly stable, although in a world of pain. He wouldn't let me out of his sight, kept grabbing my hand to hold, wouldn't let anyone else near him but was happy to sit with me without any drama.
Enter the life flight crew - 2 paramedics, a doctor and the pilot. And all heck broke loose! He didn't want a neck brace, he didn't want an IV, he didn't want to go on the stretcher... the professionals had less control over him than I did with nothing but my bare hands. He was walking around, fighting them off. The professionals didn't want our help, so we had to leave him with them. Then the police started in with the questions. No we didn't know him. No we don't know what happened. Yes there were car drivers around that might have seen what happened, but they'd all left when we arrived. Another hour of this.
By the time they got the poor bloke sorted and strapped in to the chopper, we'd been sitting on the side of the road for over 3 hours. Over an hour of that, the road was closed because of the helicopter. Ironically, if we'd had a car with us we could have gotten him to hospital quicker - it's only 45 minutes by road from where we were.
I never did find out what happened to the rider, but the guys we were with were so impressed by our management of the crash that they vowed to go and do some first-aid courses in case it ever happened again. They all admitted to being terrified because they didn't know what to do. Luckily they all used their heads at the scene, and did what was asked without question. Brizbike dudes ROCK!