What makes you think this was a psychic episode? Someone having a dream isn't necessarily psychic. Whether you or I agree that this is a warning from God isn't the issue here, but I don't get the impression this has anything to do with the occultic practice you refer to. JMO of course and you are entitled to yours.
BTW: There were some self described psychics who did warn JFK not to go to Texas, but he most likely thought they were nuts!
Amen. Well said. Thanks.