High Ollie.

Build enough speed on a medium slope (gentle slopes don't generate enough rebound)

Bend knees deeply to load (sink close to 90° knee angle)

Burst the upper body upward while swinging both arms toward the ceiling

Once the nose lifts, pop the tail hard with the back foot

Capture the maximum tail rebound and pull both knees to chest

At peak height, stay compact

Watch the landing spot, extend the legs, and land through the knee cushion