  The catastrophic decay of a spacetime with compact dimensions, via bubbles of
nothing (BoNs), is probably a generic phenomenon. BoNs admit a 4-dimensional
description as singular Coleman-de Luccia bounces of the size modulus field,
stabilized by some potential $V(\phi)$. We apply the tunneling potential
approach to this 4d description to provide a very simple picture of BoNs. Using
it we identify four different types of BoN, corresponding to different classes
of higher dimensional theories. We study the quenching of BoN decays and their
interplay with standard vacuum decays.
