Humans have exhibited a number of rather spectacular talents. Sifu Shi Yan Ming, a Shaolin monk who defected from red China to live in Manhattan has bent metal against his abs and through training that involved suspending weights from his wedding tackle can take a kick to the groin and it doesn't slow him down. Similarly, there are a lot of old training methods that produce extraordinary results such as Shaolin Iron Palm training.
Those of you who own Frozen might recall this one. Monks in some regions of Asia have demonstrated an ability to raise the core temperature of their extremities by as much as 17 degrees. Scientists still aren't entirely certain how this works.
Recent biological research has shown different energy fields emitted by the human body, and in some mutations these energy fields are stronger. Factored in with the fact that some people are born with tetracolor vision, this may account for the idea of auras and halos. A woman in Germany was actually born with such an unusually strong magnetic aura that iron filing are drawn toward her hand.
Things like what you're referring to often come down to a creative application of simple physics.
