Stargate SG-1 Episode 1.07: "Cold Lazarus" — Danielle Maurer
SG-1 travels to a planet of yellow desert, interspersed with broken blue crystals. Colonel O'Neill finds an intact crystal out of sight of the rest of the team, and it blasts him back, leaving him unconscious. A copy of O'Neill generated by the blast returns through the Stargate to Earth.