Here is the full list of all 9 Ultimate Booster Experience achievements.
Ride Ultimate Booster till the end at least one time in the City scene.
Ride Ultimate Booster ten times in any location.
Ride Ultimate Booster till the end at least one time in the Canyon scene.
Destroy all Nevrosa billboards in the city location.
Ride the eagle at least one time
Jump off the swing in any location before it crushes.
Walk of the crane with bungee rope.
Get yourself a bottle from below.
Use trap door at least once.