  Recently, some Lema{\^{\i}}tre-Tolman-Bondi metrics have been considered as
models alternative to the dark energy within the
Friedmann-Lema{\^{\i}}tre-Robertson-Walker universes. The vanishing of the
intrinsic energy of these metrics is examined since such a vanishing, in the
present case and in general, could be interpreted as a necessary condition to
consider the possibility of the quantum creation of a metric. More
specifically, this vanishing is examined in the particular case where the
Lema{\^{\i}}tre-Tolman-Bondi metrics behave asymptotically like a
Friedmann-Lema{\^{\i}}tre-Robertson-Walker universe. Finally, we deal with a
particular model ruled out after being confronted with cosmic observations. In
a minimal agreement with this negative result, leaving aside an unstable case,
the value of the intrinsic energy of this particular model does not vanish and
becomes in fact minus infinite.
