To gain extra height to make a jump, a dive can be cancelled by quickly jumping out of it for a massive boost.

While i am not quite aware of the most optimal timing, it typically seems to be to jump out of the dive as fast as possible, meaning right after the button is pressed.

These can only be performed consecutively after the first hop, as if there are any regular flaps in between dive cancels, it will no longer work. This means they must be chained directly together.