i read it and i know exactly what you mean. Sometimes its weird you just get that feeling because something so subtle in their body changes or something so subtle leads toward you knowing what they have. Now I'll be honest if you generally get these feelings and are often wrong and as a result play weakk-tight then you're fooling yourself. But I know exactly what you mean and I've gotten these feelings too. Two examples of this for me is folding AcQc preflop in a 10-20 game because I knew my opponnent had me beat preflop and another was folding AK after an open raise in 10-20 limit because I knew I was beat and he had KK preflop. Its a strange game and those electric signals you are talking about..... its true. For those of you who don't believe it, watch this clip and then try to justify this:
http://www.youtube.com/watch?v=LEfLXr3eSxs