Here's video footage from what the folks at gaming archive website Nintendo Player say is an unreleased, R-rated prototype of the old Super Nintendo game NBA Jam.
According to Nintendo Player's staff, who say they got the R-rated cartridge from an anonymous source, NBA Jam voice artist Tim Kitzrow taped some explicit lines as a goof while in the studio for some extra recording. They're calling it NBA Jam XXX, and they say their insider is so worried about repercussions that even 20 years after the original game's release, he or she is afraid to go public.
While this very well could be an elaborate fake, it sure sounds like Kitzrow. Check out Nintendo Player for the full story and what they say are pictures of the actual cartridge.