....
$Anim:                              Tempest
$Collide Ship:    [
                  if bombani == nil then
                     bombani = gr.loadTexture("EXP_flash",true)
                  end
                  if nullvec == nil then
                     nullvec = ma.newVector(0,0,0)
                  end
                  ts.createParticle(Self.Position,nullvec,ba.getFrametime(),300,"bitmap",-1,false,bombani)
                  ]
$Impact Explosion:                  ExpMissileHit1
...