We've seen all kinds of things cause crashes at bike races over the years - dogs and selfie-taking spectators being just two - and now drones can be added to that list following a spectacular crash at a criterium in California.
Footage of the crash was shot by cyclist Kaito Clark, who was taking part in the Golden State Race in Sacramento.
His bar-mounted camera captured the moment the drone shattered into pieces after hitting some tree branches, part of it apparently becoming lodged in the front wheel of a fellow competitor, with the unfortunate rider catapulted over the handlebars moments later.
According to a thread on Reddit, the cyclist escaped without serious injury - although his front wheel and helmet were both destroyed in the crash, with the drone operator offering to replace them.
Born in Scotland, Simon moved to London aged seven and now lives in the Oxfordshire Cotswolds with his miniature schnauzer, Elodie. He fell in love with cycling one Saturday morning in 1994 while living in Italy when Milan-San Remo went past his front door. A daily cycle commuter in London back before riding to work started to boom, he's been news editor at road.cc since 2009. Handily for work, he speaks French and Italian. He doesn't get to ride his Colnago as often as he'd like, and freely admits he's much more adept at cooking than fettling with bikes.