Snaking and the MK:DD boost are different. The blue sparks are a specific gameplay element you do by power drifting. Snaking is more of a bug, hence why it's not anywhere in the manauls. You have to blue sparks power drift far too much in DD, it's so slow and you jsut end up doing this over and over to win the race. Hell, half the power ups can't hit you if you're good. That's why DD is rather sucky, espically compared to MK64.