thought bubble/shock manga effect using some tweaking and additional steps from this lovely speedline tutorial: [link]
after seeing how the direction option worked I decided to try it with the pen eclipse tool and it worked - which was wonderful after a full day of fruitless searching and experimenting.
EDIT: the spacing was supposed to read 1000% however decreasing it will decrease the space between the lines, affecting how many times you have to repeat the last step.
manipulating the spacing will also affect the distance between the lines.
I hope it helps.
big download file. sorry, first tut, didn't know size specs ;Done shot