Aside from what should be obvious, this video thread shows that so many people do not see what is obvious.
Should anyone really CARE that you didn't run toward the tree at top speed and do a parry, then full-force thrust into the tree?
No.
But, too many people live in their armchairs in front of their PCs. They talk of smaller caliber bullets being mosquitoes that no one is afraid of. They talk of carrying six knives and eight guns to be ready for the fight scene from their favorite Segal movie. When they go out in public, they carry a sword or an AK-47 because they CAN (and want to impress the cops with their knowledge of the Constitution and law when they get stopped and questioned for their stupidity). They spend hours prepping their knives to deploy in 1/100 of a second and shave hair, but never cut with it.
Etc.
I took the video for what it is: proof dispelling a myth that the knive will shoot out of your hand like a greased pig if there's anything that could be a lubricant on the scales.
I guarantee NO ONE who said this test was crap would be willing to take the place of that tree or log, even if you soaked your hand AND the knife handle in Amsoil synthetic 5W-30 for an hour before doing the test.
Some people get it.
Some people don't.