It's just gravity. A living tree branch is flexible like a fishing pole, and when weight is applied such as in new branches and leaves the weight of it pulls it down toward the ground. Enough time like that and the tree compensates by strengthening the upper part of the joint making it somewhat permanent. If you trim away some of the end weight the branch will raise back up some
so when they bloom, they will be at the end of the branch and not in the middle.
Having a lower back end will cause your vehicle to tilt up in the front, causing drag. so lower back pressure will cause loss in Fuel efficiency.
Llangurig branch ended in 1882.
Sandgate Branch ended in 1951.
Rotorua Branch ended in 2001.
Framlingham Branch ended in 1963.
Northport Branch ended in 1978.
Spilsby branch ended in 1958.
Masham branch ended in 1963.
Creedmoor Branch ended in 1966.
Lexington Branch ended in 1870.
Whitestone Branch ended in 1932.