Langer calls this a placebo effect, but others have called it hypnosis, motivation, drive, inspiration, etc. Indeed, with the right information, people are capable of doing lots of things that can be attributed to all sorts of semi-mystical or obscure processes. But the point is there is no need to hypothesize weird psychological causes when information itself is good enough.
Indeed, a more accurate name for all this extraordinary motivation is 'semantic priming', which means that information, as processed by our cerebral cortex (the so called thinking organ or grey matter in the brain), can prime us to ignore or experience pleasure or pain, increase our metabolism, do embarrassing or stupid things, hallucinate, or even blow ourselves up. By refusing to accept the fact that the extraordinary can easily be caused by the ordinary, we open up our behavior to a myriad motivational causes from the simple placebo effect to intrinsic motivators, free will, hypnotic states or evil spirits. So the label changes, but the cause is the same, at least until the next psychologist relabels the wheel.