Not personally but I know of one a few months ago @020x
In his instructions, this forum participant wrote that when he was training, his face was "filled with blood" and that this is a normal feeling when squeezing arteries. He could still breathe normally without feeling his head exploding.
But is it normal to feel your face getting bloodshot?
When I was approaching loss of consciousness, my eyes began to darken, and a slight pleasant chill appeared in my head.
On the contrary, my lips were numb...
Perhaps this forum member was doing something a little wrong?
I don't know...