Also, if you fall off course, when the guy puts you back on course, push a as soon as you hit the ground.
Same in Double Dash....
i always get a boost at the start. you all act like its so hard. you just start holding down A when the 2 is starting to fade and before the 1 appears.
It isn't hard...it is sooo simple...if someone can't do it, I wouldn't be suprised if he/she couldn't even do the race anyway....