fall off one's perch

fall asleep

To be affected by paresthesia; to go numb.

fall between two stools

To fit into neither of two categories and, hence, be neglected or fail…

fall off a truck

Of an item of merchandise, to come into a person's possession without …

fall off the back of a lorry

Of an item of merchandise, to come into a person's possession without …

fall through the cracks

To be missed; to escape the necessary notice or attention.

fall through

To be unsuccessful, come to nothing; to be cancelled; not to proceed.