The plot is part buddy comedy, part road trip movie, and part high concept fantasy comedy: Schwarzenegger and DeVito play Julius and Vincent Benedict, fraternal twins who were created in a lab experiment and separated at birth. A collection of Nobel Prize winners, artists, and scholars donated sperm, which were combined to form the twins. (Watch for a very young Heather Graham as their birth mother.) All the best components from the donors combined the form the superhuman Julius. All the garbage left over went to form the diminutive Vincent.