For Nile Adventure:
When you fall off a waterfall, you will see a freaky water beast with lazers. Boost while falling put on the boosters and before reaching the first leg of the freak, cut down on the booster and travel without booster. Later on you will see a floating 9 sec booster. Wait, the eye of the freak will pop out and make sure to have your booster. Turbo out on the eye when it appears