We don't have magpies in the States, but in Australia the birds are known to be territorially fierce. In layman's terms, they're assholes and will dive-bomb you right into oncoming traffic. They're an especially big problem for bicyclists who have done everything from placing branches in their helmets to putting googly eyes on the back in an attempt to ward off the winged-jerks.
Australian radio station Star99FM sent out correspondent Amber out for a bike ride who quickly discovered she's not a fan of the birds. It's only a bird (and even if the reaction is played up for the camera) but man, does this girl lose her shit in two seconds flat.