  Dipolar-controlled quantum deflagration going over into quantum detonation in
the elongated Mn_12 Ac molecular magnet in a strong transverse field has been
considered within the full 3d model. It is shown that within the dipolar window
around tunneling resonances the deflagration front is non-flat. With increasing
bias, dipolar instability makes the front turbulent, while its speed reaches
sonic values, that is a signature of detonation.
