You may have seen those planes that haul advertising banners across the sky, often at the beach or other densely-populated tourist areas. The process that attaches the banner to the plane is interesting. The small planes they typically use lack the horsepower to take off while dragging a banner, and unfurling a banner in flight runs the very real risk of getting it tangled up in the plane itself. So, the banner is attached, unfurled, to an upright on the ground. The plane then sweeps in very low while dragging a hook that snatches the banner.
When my sister was a young pilot, fresh out of college, she was offered an opportunity to do this as a summer job. I’m glad she didn’t take it.