[quote name='The Funk' post='383141' date='Jan 17 2009, 12:27 PM']Je ne comprends pas.[/quote]
Imagine playing in C minor... they'll use C harmonic minor, then when there's a G7-Cm cadence at the end of a phrase, they'll play G harmonic minor over the G7. At first glance, that might not seem like a good idea, but it works.