I don't remember exactly, but I think CAT is "Cycle Adjustment Technique" by Daniel Love? Some of his more innovative techniques are not widely known so some may not be familiar. Essentially you are adjusting your normal sleep cycle around to kind "shake things up," and promote greater awareness--am I right? So you seem shaken up so I guess that worked!

In all seriousness, I would say that that technique is fine, as long as you have some understanding of what you are going to do with it. Are you going to use the REM rebound on another day for a greater chance at lucidity and intensity? Are you just trying to shake up your routine in general, and are still practicing other induction techniques? I don't really know what else you are doing so it's hard to say whether or not you've succeeded.