We demonstrate that the classical helium atom exhibits algebraic decay of the survival probability in the autoionizing { eZe} configuration. Excitation towards asymptotic orbits of marginal stability is identified as the cause of the nonexponential decay. Since one electron travels along a bound Kepler trajectory of infinite excitation in these orbits, we argue that the classical decay law will prevail in the quantum dynamics of a wave packet launched along the { eZe} configuration.