This thread is a classic showpiece for typical psychological flaws humans posses such as confirmation bias and cognitive dissonance.
These types of people never say "Gee, my prediction was wrong. Perhaps I am wrong about having magic powers? Perhaps I have been mistaken all along?"
Instead they justify their failing by inventing excuses. This behavior is common to most people, not just the "crazy" ones.
James Randi, an ex magician, runs a challenge called "The million dollar challenge" which provides a prize of $1,000,000 (obviously
) to anyone who can prove they have paranormal abilities.
The James Randi foundation and the claimants are both involved in designing the test in such a way as to be fair to the claimant and allow them to demonstrate the claimed ability (if they actually do posses it) but also to ensure any chance of cheating or self deception is eliminated. Once a test protocol is agreed upon by the claimant and the James Randi foundation, the test is performed.
Unsurprisingly, no one claimant has ever demonstrated paranormal abilities.
However... every single person who has failed, has blamed the James Randi foundation for their failure, not themselves or a lack of paranormal ability.