" a blade is a blade only when it cuts" or figuring out the necessary fundamentals like velocity, mass, angles & so on...

country side
& not of Swiss type.

 find a dead pig
not overly decomposed
if possible.

around dumps&  land fills.

nearby tree, rope& no one within visual.

      it really  is analogous.
doesn't strike back
or evade,
but, provides experience.
priceless experience.