About 20 graffiti sprayers halted a passenger-filed metro in Amsterdam on October 31, threw a bicycle onto the tracks, and covered the entire train in paint within minutes, according to AT5. The Metro 51 train at the Henk Sneevlietweg platform could not continue its route because a bicycle was thrown onto the tracks, and the driver’s window was also sprayed with paint. The GVB described the situation as frightening. The transit company's spokesperson spoke briefly with NL Times about the incident, saying it involved “graffiti artists; rather, they call themselves ‘artists’.”