How to turn left and right

Another wild claim by a hypnotist...and yet... "generally, subjects are unaware of the stimuli in the unattended ear, although these stimuli exercise an influence on various response parameters of the attended stimuli." (Shevrin and Dickman). Hypnotists have held that the unconscious is the storehouse of our entire history and experience; the root of our problems as well as the source of the solutions. Modern research, scientific instruments, and empirical observation have begun to prove how often those old time hypnotists were right on target. We might say that they knew how to turn left and right at the same time.

Hello,

Q1: Could anyone paraphrase or illustrate the words in blue for me?

Q2: what does it mean about "turn left and right" ?

Thanks!