Are you there God? It's me, Moviegoer. Please, why do movies like this happen? Jim Carrey plays a man granted omnipotence — though clearly not omniscience — by a Supreme Being who's grown tired of his constant whining. It's the kind of wonderful, what-if fantasy premise that has given us IT'S A WONDERFUL LIFE (1946), HERE COMES MR. JORDAN (1941), OH, GOD! (1977) and other films and TV shows in which an ordinary guy has a close encounter with a fun-lovin' Lord. But while it seems a heavenly idea to give the prodigiously talented and always inventive Carrey a role as inherently boundless as that of the Genie in ALADDIN (1992) or Carrey's own title character in THE MASK...