LOS ANGELES, April 20 (UPI) -- Over Your Dead Body , in theaters Friday, is not always successful at the tonal balance it is trying to strike. It has enough surprises for a good night out at the movies and debates about what did not work after. Dan (Jason Segal) and Lisa (Samara Weaving) spend a weekend at a cabin in upstate New York where each plans to murder the other. Both plans go awry and the married couple has to survive the weekend when a trio of escaped convicts and their corrections