You need: A thin napkin, A salt shaker with a metal unscrewable top, and some ground pepper.
What you do: First unscrew the salt shaker and dump out a little bit of the salt. Then take your napkin and put it on top of the open shaker. Pour some pepper into the napkin, making sure it doesn't go through. Then screw the top of the salt shaker back on, and rip off the napkin that is still showing. Then put it on the table, and watch someone be amazed when the salt shaker puts out pepper!