Possible Clues:

• Like a famous Welles radio broadcast
• Elaborate falsehood
• Canal flows uphill for god
• Leg-pull, short-cut after half-hour
• Welles' Martian invasion broadcast, e.g.
• Phony discovery, perhaps
• April 1st event
• House with a faulty sign? That's deceptive
• The performances of Milli Vanilli, essentially
• Big con