14. If you suddenly feel unwell in a public place, make sure to only ask one person for help
You should only ask one person for help because of a well-documented psychological phenomenon, known as “diffusion of responsibility”. To put it simply — you’ve got much better chances of receiving assistance from one particular person than from a whole crowd of people.
13. If someone has a concussion, elevate their head so that fluid doesn’t build up in their brain.
Lift the head slightly, about 20-30°. However, if you suspect a spine injury, it’s important to not move the injured at all.
