  We present a sample of the most interesting classical Cepheids selected from
the OGLE collection of classical Cepheids in the Magellanic System. The main
selection criterion for this sample was the presence of non-standard, unique
pulsational properties.
  The sample contains the first known double-mode Cepheid pulsating in the
second- and third-overtone modes and a large number of objects with non-radial
modes excited. We also found Cepheids revealing Blazhko-like light curve
modulation, objects ceasing pulsations or showing atypical shapes of their
light curves. Additionally, the status of several triple mode classical
Cepheids is updated based on OGLE-IV photometry extending the time baseline to
15 years.
