http://soundcloud.com/stupidfresh/dj-godfather-ghetto-electro-sf-rmx
check this out and whne it kicks in around 34 seconds and then again at 1:34 its that riser thats detuned … anyone know how this is acheived ive been messing with the sounds from the fidget tutorial but nuthing is getting close
I could be wrong but would say the low bass part is being pitched by an lfo (pretty standard) and another bass part (same patch) is being played afew octaves higher. with glide enabled so the sounds tries to pitch to each other when they both play.
hope that makes sense 
(sorry but havnt seen the fidget electro tutorial yet so hope I havnt just repeated what they say).