A loud high pitch call that summons the Scientology Lord XENU. Famous actors known to have the special ability of the "Xenu Call" are: Tom Cruise, John Travolta, L. Ron Hubbard, Robert.
"Ah man! Did you just see Tom Cruise use the Xenu Call and summon the dark lord to forcefully kill/possess/give painful dingleberries to Oprah?!"
"FUCK YEAH MAN!"