Often, a personal experience of paranormal events (telekinesis, precognitive dreams, telepathy, etc.) that does not run afoul of psi uncertainty requirements because of the limited exposure, is "arranged" and thus allowed to flaunt the PMR rule set to provide the one (or few) experiencing it with a lesson. The lesson may be no more that to provide personal data that a larger reality exists. Such an experience opens the mind toward reality being larger and more complex than one previously thought and conditions the individual to be more open toward finding out, searching for truth, and thus eventually growing up. Those individuals who have a reasonably good potential to grow up a little in this lifetime are commonly nudged toward a growth path by such "arrangements".
If there is no point (the event has a low probability of leading to an decrease of the system's entropy), or the psi uncertainty principle is violated (which is essentially the same thing), then the paranormal event is disallowed. For example, making rocks fly in front of Randi seems to fall into this category (low probability of leading to a decrease of the system's entropy). So does you picking up a rock with your mind while alone in your house, or winning the lottery by paranormal cheating.