Ashta Siddhis or 8 supernatural powers

These are listed as follows:

1. Anima - Shrinking one's body.

2. Mahima - Enlarging one's body.

3. Garima - Increasing weight of body.

4. Laghima - Decreasing weight of body.

                       (One can fly!)

5. Prapti - Get things desired 

                  (out of thin air!)

6. Prakamya - longevity, teleportation, living

 underwater.

 7. Isitva - Control Nature.    

 8. Vasitva - Control others' minds.   

According to Patanjali Yoga Sutras (4.1), Siddhis can be attained by birth, herbs, power of words, austerities or concentration.

Examples of individuals possessing these Siddhis & using them where needed, are present in the Hindu epics, Ramayan & Mahabharat. Of course, these Siddhis are considered not possible as they violate the laws of physics.

Here it can be recollected that in Newtonian physics light travels in a straight line, but in Einsteinian physics, light rays can be deflected.

In the Sci-fi serial "Star Trek", teleportation was common. In Harry Potter's magical world, many similar powers were used. In  the case of spiritual leaders, many thousands of believers claim to have witnessed the Prapti Siddhi being performed. 

But it is also true that "Magic (or Siddhi) causes as much trouble as it cures" as put by J.K.Rowling in her "The Tales of Beedle The Bard."