For one woman, Sunday's Pride parade in Seattle was a real knockout.
A 2-pound drone, which costs about $1,200, crashed into a building during Sunday's festivities and fell into the crowd, striking the unidentified 25-year-old woman in the head, Seattle police said Monday.
Her boyfriend caught her as she fell, and an off-duty firefighter treated the woman until police arrived.
Det. Patrick Michaud, a spokesman for the Seattle police, told NBC News the collision left the woman with "not a gentle concussion."
Police said they're seeking the drone's pilot, described as an unshaven white man in his 20s with "a noticeable tattoo of a woman somewhere on his body."
Authorities around the world are struggling with how to keep people safe with unmanned aircraft buzzing around overhead.
Last year, a drone fell from the sky during a triathlon in western Australia, injuring a runner.
Also last year, Seattle police questioned an Amazon employee after sightseers at the Space Needle saw a small quadrocopter buzz the landmark's observation deck, with some saying it had actually struck the window.
And earlier this month, singer Enrique Iglesias underwent surgery for a serious injury to his hand, caused when he reached out for a drone during a concert in Tijuana, Mexico.