thaumaturgy \THAW-muh-tuhr-jee\, noun:
The performance of miracles or magic.
Thaumaturgy comes from the Greek words for "wonder" (thauma) and "work" (ergon). A practitioner of thaumaturgy is a thaumaturgist or thaumaturge.
Of course, none of these improbable meetings ever took place in reality. But within the realm of showbiz thaumaturgy, they're perfectly acceptable examples of latter-day digital compositing, wherein it's possible to have anything share a frame of film or video with practically anything else.
-- John Voland, "Prez presses tech buttons", Variety, July 21, 1997