Hello budys, sorry to keep your waiting, I didn't know about this topic before DarkSpinesSonic tell me.
My english it's not so good, because all that I know I learn playing games, listening musics and watching movies.
So, what I do in the biolizard is "shake" my fingers as fast as possible to do continuous homing attacks, I don't know if "shake" is the right word to use to what I do, an example is, when you feel cold you body shakes right ? Is that right o.o' ? I don't know if is the right word.
I learn how to shake since I started to play guitar hero 1,2,3 on expert on the dual shock normal ps2 controller, some songs are so hard and pressing the button normal is impossible to beat(example: TTFAF, knights of cyndonia, holiday in cambodia, the way ot ends...), and shaking make it easy to beat.
So 2 bosses on the SA2B(my favourite game =D) you can do this, those bosses are biolizard and finalhazard, you shake your finger to do it quickly.
So there it is, I upload a video of me shaking my fingers, but some people think it is fake, I'm using a camera of a cell phone with 2.0 megapixels and it cannot record the shake, on the video seems to be my fingers are not moving.
If you guys tell me an example to video that I could record to prove and show how I do the "shake", I can record it ^^
Hope you guys understand it...
Link to the video of shaking
http://www.youtube.com/watch?v=OH3UMIcqXJg