The operator of a drone that knocked a woman unconscious was sentenced Friday to 30 days in jail, Seattle prosecutors said. The woman was attending a local parade when the drone crashed and struck her.

Paul Skinner, a 38-year-old man from Washington state, was charged with reckless endangerment in connection to the 2015 incident, in which an 18-inch-by-18-inch drone collided into a building before falling into a crowd. The authorities said the 2-pound drone struck the 25-year-old in the head and gave her a concussion. Her boyfriend caught her before she fell to the ground. Another man suffered a minor bruise. The accident took place during during the city's Pride Parade.

Skinner, who had turned himself in, plans to appeal the sentence. His attorney, Jeffrey Kradel, said the punishment was "too severe." His client remains free pending the appeal's outcome. A misdemeanor reckless endangerment charge—one that poses "substantial risk of death or serious bodily injury to another person"—carries a penalty of up to a year in jail.

A Seattle jury found the defendant guilty last month.

Seattle City Attorney Pete Holmes, who had sought 90 days of jail time, said the crime at hand was "a serious public safety issue that will only get worse." Holmes added that "Operators should know that we will continue to go after them when they disregard public safety."

A May 25 restitution hearing is scheduled in Seattle Municipal Court. At that hearing, the amount of money Skinner must pay for the woman's medical costs will be debated. Skinner was also ordered to enroll in a drone safety class, regardless of an appeal.