As you enter the danger zone, the area where their actions will require you to react, a scan of your possible exits and general surroundings will offer you something. Prepare feet and hands to get the job done. Don’t narrow your vision as there are still other ongoing possibilities of danger. And then your in the hands of the gods, pray they behave, then relax and breathe again when you pass easily.
As Tentacle’ said, there is little you can do and this highlights how vulnerable we are on our bikes. Some of the clips you can see of huge head on car crashes shows how well occupants are protected but a bike gives you nothing. The only help is our ppe.
Sobering scenario.