Don't scream on rollercoasters: Japan theme parks to visitors amid COVID - 19.Visitors at Japan's amusement parks are being asked not to scream when riding rollercoasters and other rides to help prevent spreading the coronavirus. Some customers complained it was impossible to stay quiet on Fujiyama rollercoaster which reaches speeds of 130kmph and drops 70 meters. In response, the theme park released a video of two senior executives riding the rollercoaster silently.