  Transient effects at excitation of high-Q resonant modes at a leading front
of a laser pulse and their decomposition at its trailing edge during the pulse
scattering by a particle are discussed. The main attention is paid to the
nonradiating (anapole) mode excited in a high-index cylinder. The problem is
studied both analytically and numerically. It is shown that the anapole is a
steady but essentially nonequilibrium mode, which can exist if and only if the
host particle is irradiated by a continuous incident wave. As soon as the
incident wave is switched off the anapole becomes a radiating mode and
collapses very fast owing to extensive radiative losses. It ruins the hopes to
employ the anapole-like excitations as storages for the "frozen light."
