If Garth'zel wasn't blind from hibernation sickness, he'd give the set of soldiers who were his dubious rescuers from carbonite a very unamused look. As it is, he does a fairly good impression of doing so. "Clearly, no one warned you of the dangers of angering a Sith."
He may be weakened from his stay in carbonite, but not that much. A hand stretches out, Force lightning shooting forth to show them the error of their ways. Assuming they survive it.