I imagine that happens because the leaf is old and its stem is weak and can't hold the old leaf.
When a branch of a tree is shaken its fruits fall down. this is mainly due to inertia of rest. when the tree is shaken the tree is in motion, but the frits remain to be at rest. this is when they seperate from the tree and hence fall due to gravity.
Either because some of the leaves are starting to die already, or because you are shaking the tree very hard. Leaves don't fall off a tree that easily when a tree is healthy.
When a branch of a tree is shaken its fruits fall down. This is mainly due to inertia of rest. When the tree is shaken the tree is in motion, but the frits remain to be at rest. this is when they separate from the tree and hence fall due to gravity.
Fruits and leaves are composed of matter and therefore have inertia. When you shake them, therefore, there is some inertial resistance, which can be sufficient to overcome their attachment to the tree.
Things fall down b/c gravity pulls in that direction. Fruits and leaves fall down when the added force of being shaken together with gravity becomes bigger than the strength of the attachment to the tree.
leaves are what trees use to breathe when the tree has too many it takes some off a tree balances its leaves
Except a few orchids growing on land, most of them are epiphytes. So if an epiphytic orchid is detached from the tree it will be a disadvantage for that orchid to sustain.
Its leaves
Orchid tree usually sheds its leaves in winter though some species do not.
gum tree (Australian) Green Ash Tree
It's called ... gravity!
A Tulip Tree has the largest leaves.