This may be a common practice. I imagine it is, the easiest and safest way to hold a large snake for probing.
I believe I read about it in something written by the Barkers but I don't see it on the VPI site.
The snake should be put into a pillow case with only enough tail sticking out as the prober needs.
It isn't easy to hold a snake like this but it sure beats having that extra 8 feet of snake waving around and knocking things over. Or biting.
As I said, I can't take credit for this, it's just something I read somewhere that has worked well for me.
Andy
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give up television - 100% cold turkey. Leave what isn't real and go to what is real.
Spend time with nature, see the ground and the sky, feel your place on this earth,
see the trees, the plants, birds, animals, feel their life. And feel your own life.
Dr. William Pierce (paraphrased)