  I examine the morphologies of the brightest planetary nebulae (PNe) in the
Milky Way Galaxy and conclude that violent binary interaction processes eject
the main nebulae of the brightest PNe. The typical morphologies of the
brightest PNe are multipolar, namely have been shaped by two or more major
jet-launching episodes at varying directions, and possess small to medium
departures from pure point symmetry. I discuss some scenarios, including a
rapid onset of a common envelope interaction and the merger of the companion,
mainly a white dwarf, with the asymptotic giant branch core at the termination
of the common envelope. Some of these might be progenitors of type Ia
supernovae (SNe Ia), as I suggest for SNR G1.9+0.3, the youngest SN Ia in the
Galaxy.
