John Leonard

Man's sitting in a bar, the only one there excepting the tender, who goes to the back room for a bit (man's a regular, nothing to worry about).  Reaches into the bowl of peanuts to grab a few, but when he pulls his hand away the nuts have interlocked around it so as to create a perfect rectangular solid, absolutely smooth, like metal.  And more nuts are following, drawn on by who knows what power, and now his entire forearm's encased.  By the time the bartender returns the man is nearly entirely held within a gapless rectangle of peanut, only his head free to gasp out "what is this? help me!" and the bartender, idly cleaning a glass as the peanuts fly down the man's gullet, sealing his fate and his respiratory tract, responds, "oh, that's the peanuts.  They're complementary.".