Of course, TMZ has obtained a photo of the stuff:
We're told the challenge involved teams of twins drinking the full glass of donkey semen -- with a glass of urine thrown in for good measure. Contestants had to drain both glasses in order to move on to the next round.
Our sources say NBC execs had multiple pow-wows in the months after the stunt was shot ... but eventually gave FF producers the thumbs up.
So what you're telling me, TMZ, is that NBC brought this crappy reality series back from the dead for this? No wonder the network is performing so terribly in ratings. By the way, who do you think had to gather all the "supplies" for the challenge?