If you walk around a board laying on
the ground, you can't see its length
if you are straight in line with it.
Call this the
igloo myrtilles fourmis
IPBLE: Increasing Performance By Lowering Expectations.
I think I understand. Are you saying that your eye-level is exactly the same as the level of the board, and so you see it only as a line?
If so, it the line would seem to get bigger as you walked around it and then get smaller again. If the board was rotating instead of you, it would look like some kind of phantom growy-shrinky line.
Why did the vector cross the road?
It wanted to be normal.