The situation that greeted you when you, the lead first-aider at the annual Boglieglen Downhill Mountain Biking Enduro, arrived in the track marshall's track-side tent was clearly serious. A competitor, not fully paying attention during a quick trackside repair, had accidentally picked up an un-labelled bottle, and had taken a sizeable drink from it. He had meant to take a slug from his similarly sized bottle of a well known and popular carbonated beverage with it's familiar red and white label, but, instead, had reached across and picked up the wrong bottle.
An easy, and potentially deadly, mistake to make.
The casualty was on the floor, unresponsive, and had thrown up. The track marshall had had the good sense to lay the casualty in the recovery position, having determined that there was no reason to believe the casualty may have any injuries which would preclude doing so.
The casualty was trembling and was starting to drool a foamy spittle. Speaking with the casualty's team mates revealed that no-one knew what was in the bottle ... it was a concoction the casualty had created himself, and which, he had been heard to boast, could return a chain and cassette to 'near new' condition no matter how 'gummed up' they had become riding the muddy trails of the Boglieglen.
Clearly, the casualty is in a bad way, and appears to be deteriorating quickly ... and YOU are in charge.