  We study a spherical antimembrane in the eleven dimensional pp wave. In this
background, a single antimembrane breaks all the supersymmetries because its
dipole is misaligned with the background flux. Using the BMN matrix theory we
compute the one-loop potential for the antimembrane. Then we put the
antimembrane in the field produced by a source spherical membrane and compute
the velocity-dependent part of the interaction between them on both the
supergravity side and the BMN matrix theory side. Despite the aforementioned
nonsupersymmetry of the antimembrane, it is found that the results on the two
sides completely agree.
