Venamm: Fishtailing occurs when both rear wheels loose traction under hard acceleration (with a limited slip or locked rear end). If you back off on the throttle a tad, the tires will gain traction, hopefully when you are pointed in the right direction. Squeezing the throttle instead of mashing it to the floor is a good idea with these light, often overpowered beasts. Ain't they fun?
Rich