  In [G. Baker et al., Phys. Rev. Lett. 81, 554 (1998)] a number of supposedly
novel and surprising features were observed in a system composed of two
periodically driven and asymmetrically coupled pendula. In particular it was
claimed that `permanent synchronization ... does not occur except as a
numerical artifact'. It was suggested that this might be related to the
particular type of coupling. In this comment I want to point out that some of
these claims cannot be maintained. The synchronization in this system is
precisely of standard blow-out type. The observed intermittency is exactly the
on-off intermittency well known from the synchronization of multifractal
chaotic attractors.
