A character in the movie I Am Legend. Fred is a manikin set up by Robert Neville (Will Smith) to act as a human stand-in as he is the last man on earth.
A following has been following Fred as people have noticed a slight head-movement from the plastic manikin, along with his torso suddenly and subtley rising after he was shot by Robert.
Most say the head movement was to illustrate Robert Neville's going insane as something that hasn't moved in three years was suddenly someplace else. And the rising torso is that it was shot down into a puddle, making it bob.
Dude, I think there's a Fred the Manikin around, I think I just saw something move!