(Portland, OR) -- Portland's Oaks Amusement Park is facing another lawsuit in connection to a ride malfunction that left dozens of people dangling upside down 50 feet in the air over the summer. A woman has filed a lawsuit on behalf of her 13-year-old daughter, who she says experienced "fear of heights, medical expenses and ongoing post traumatic stress and anxiety." Officials say 28 riders were left hanging upside down for about half an hour after the AtmosFEAR ride got stuck at its highest point in June. The mother of a 14-year-old girl who was on the ride filed a lawsuit shortly after the ordeal, alleging the park failed to maintain the ride, didn't know how to manually lower the ride after it got stuck, didn't warn passengers of the dangers, and didn't update passengers stuck upside down. Oaks Amusement Park has also filed its own lawsuits against the manufacturer of the ride.