This person left out many details and made the early closure look racially motivated.

Wikipedia has a better run down
>On June 30, 1960, to draw attention to the park's racial segregation, the Nonviolent Action Group, led by students from the historically black Howard University organized an 11-week civil-rights campaign against the park's policies

>Members of the liberal, politically connected and largely Jewish Bannockburn community near the park joined the students in protesting and picketing for change. As a result, the park opened its doors to all races for the 1961 season.

>On Easter Monday 1966, the park's roller coaster closed early after a cigarette thrown from a coaster car damaged its tracks.[ When park officials did not explain the reason for the closure, visitors from Washington became disruptive. As tensions flared, the park closed for the day, resulting in a mass exodus of about 6,000 customers.

>Reports of slashed seats on the first bus returning to the city prompted D.C. Transit to stop bus service to Glen Echo, stranding hundreds of people at the park. Vandalism occurred during long nighttime walks back to the city, adding to tensions in the communities surrounding the park

she couldn't hold it in but she didn't want to get off the train.