The sensitivity of the human eye is so keen that on a clear, moonless night, a person with 20/20 vision standing on a mountain can see a match being struck as far as 50 miles away. Much to their amazement, astronauts in orbit were able to see the wakes of ships.
Also: I got a mandoline last week. Orka (cheap end). I have already cut off one knuckle and the end of another finger. That sucker is dangerous and I am band-aid ridden. But I am such a corner-cutter that it is very, very VERY hard to make myself use the holder as soon as I really should. It’s the first kitchen accoutrement that I’ve ever been afraid of, unless you count the disposal. On a positive note, I’m pretty sure these qualify as cook’s scars. Yeah, baby, I’m bad. I have the bad, mad cooking skilz and the scars to prove it.