Rein starts at the bit, goes between my pinky and ring-finger, gets grasped by my middle 3 fingers, then exits over the top of my 2nd finger and off the side of the neck, with my thumb on top of the rein, and my pinky under the rein. Middle 3 fingers grasp the rein, thumb and pinky provide stability and control. Thumbs up.
The only time I can remember ever bridging my reins was when I was riding with 2 broken fingers and could only use one hand. It's good to know how to do it. It can come in very handy.