Hi Mike!
Oh no, there is nothing silly about that question. There was once a +80 page thread about it on Loops and I think nothing really conclusive came out of that, except that my and I suspect many others rollcasting got better of course.
Ok, itīs as simple as it sounds but like all motorical things it can take a bit of experimenting and practice to get to work. Itīs just about pulling back the rod tip slightly after stopping it.
Here is a video of a guy doing it heavily with a DH-rod. Look at how he uses his hands and the rod during and after the stop. Check the slowmos especially. Thatīs a pullback stop. It goes by other names of course but pullback is a simple, straight to the point and descriptive term that works for me.
http://www.bazzflyfishing.com/Website/Videos/Scandispey.htmlWell, please donīt ask me how it exactly works and about the physic behind it. It seems to help accelerate the line and reduce the counterflex. Loops often get a bit tighter and faster using it, and if you play around you can make long line rollcasts with a smaller d-loop using it.
As for being related to the basics of the rollcast. I teach this to beginners and find that even if they donīt get the actual pullback working at once they do get a better loop formation and learn to stop the rod tip better in shorter time.
Best regards
Stefan