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Here is a cast that I rely extensively on when I was fishing in Maldives. The one week plus that I spent in Maldives this year flats fishing Spey style really brushed up all my strokes, especially my cack hand cast. I am really glad I put in enough hours practicing before the trip.
On the surface, this cast looks just like any normal Perry Poke but there are important differences. I call this cast the Speed Poke because all the crucial moves are speed-ed up with the objective of minimizing the sink time of the heavy fly. When Spey casting a heavy fly like the Clouser, the deeper the fly sink during the anchor set-up phase, the harder it is to yank the fly out from the water during forward cast. This will result in a what I would call a stuck anchor situation where the fly would not have enough energy to turn over properly.
When doing the Speed Poke, from the moment the fly lands in the water after the anchor placement move, everything has to move fast to minimize sink time. How I achieve this is by:
1) starting the forward poke a split second before the fly touch down
2) starting the rip just as the leading edge of the fly line touches water, before the main bulk of the fly line piles
In contrast, a normal Perry Poke would only start the forward poke motion after the fly touch down and the rip back would only commence after all the fly line has completely piled on the water ahead. These two adjustment to the poke makes this cast effective in handling heavy fast sinking fly.
The speed poke also makes the casting of intermediate sink Skagit head such as Skagit Extreme Intermediate and Ambush Clear Head, a lot more effective. Unlike floating heads that can sit on the water indefinitely, intermediate Skagit heads sinks during the forward pile. This results it more stick and makes it harder to rip and energize the D-loop. The Speed Poke solve this problem by only letting the line touch water momentarily but not long enough to become sticky. The video below emphasis this point more clearly.
Here is another video of the speed poke performed in saltwater flats fishing