Since a photon is its own antiparticle, you might imagine that a photon and an electron "bounce" off of each other in time, and both reverse their directions. F

Since a photon is its own antiparticle, you might imagine that a photon and an electron "bounce" off of each other in time, and both reverse their directions. From our point of view it looks like two photons created and two electrons annihilated, or vice versa. Interesting idea at any rate.