There are a small number of things you can do that might seem sensible but would make a situation worse. You learn those things in the right context. Anyone wh

There are a small number of things you can do that might seem sensible but would make a situation worse. You learn those things in the right context. Anyone who has a minimal amount of marathon training should know about hyponatremia; anyone who works with magnesium should know to put it out with sand; many people know that you shouldn't pull out the knife. In a group of N people in London, there are first aiders and medical professionals present who contextually know this stuff. On the balance of probability, I guarantee you there was more than 1 NHS worker pushing that bus.