I fished with Iaconelli once and we discussed this. He said between the natural movement of our bodies - you cannot hold perfectly still - and often the rocking of the boat, you'll get enough movement with the worm on the bottom. If any movement is used it would be very small and subtle. A hard pop makes a shaky worm really really jump hard.
Not that I wouldn't try that to see if it works, but he said subtle typically is the best option. Ditto with a drop shot.
PJ, mistyped, Red Bug is the color
Clem, when I "shake it" it is really subtle like a 1-2" move of my wrist. I like the light weight like PJ, usually 1/8oz and let it drop nd twitch with a slack line so the fish feels no resistance. I fish them on flouro and Loomis GLX and you will get a soft pick up feel or the line just swims away. I fish it slow; in a hurry; if you know what I mean.