Ive read that if you feel the back cast then the line is already falling
your thoughts.

I would have thought that , if you can feel the back cast, you would feel it most strongly just before it starts to fall. Once its falling there is an introduction of slack line which would cause the rod to unload. In my experience feeling the rod load is actually defendant on the amount of line being cast, the stiffness/softness of the rod, the caster grip on the rod and the casters timing.

Frank

__________________
Frank Williams APGAI

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Taken from an Article by Al Kyte
Flycasting instructors agree that your pause at
the end of the back cast should last until your
line has almost straightened. If your forward
cast is accompanied by a whip-cracking sound,
you started while the line was still moving rapidly backward - too early.
........................................

(If you feel a tug, your
line has straightened and is starting to drop -
you’ve waited too long).
.............................................................
If you wait this long when
using a weighted fly, it will swing up and down
while being pulled forward and may hook you.
Despite your best efforts, the fly line will not always straighten behind you, especially if there
is wind. So your initial forward movement may
have to help pull the line straight, as well as start
it forward. Any unevenness in the rod’s initial
pull on this line, which can result from punching
or shocking the rod, will cause the line to deviate from its straight path

Not really, but my wife always said that I was an insensitive bas***d.