A flag 'flies' in front of the building. = There is a flag 'flying' in front of the building.
The restaurant 'made a flying start' by filling up on opening night.
After some difficult years, the company is 'flying high' again.
(..) - What do you want? MELINDA: Hal! Make them go away! I don't want no salesmen... ...in the middle of the night. Tell them to take a flying fuck at a rolling... COFFEY: Just to help. Just to help, boss. That's all. You can't. No one can. (..)1999 The Green Mile