Remember when you were a kid, and you would were out roughhousing with your friends. Maybe you are running along the sidewalk when suddenly you trip and scrape your knee. You pop up, survey the damage, and realize that the whole course of your day has changed.
No, I remember quite well: Mercurochrome was soothing when applied to a wound, Merthiolate was the one that burned like lava when applied to a wound.