From an NPR article:
The Fuji-Q Highland amusement park near Tokyo has an unorthodox request for its roller coaster riders.
“Please scream inside your heart,” and not out loud, the park is asking. The unusual ask is meant to reduce the risk of spreading the coronavirus.
While some may be skeptical that it’s possible to quietly ride a roller coaster, a promotional video from Fuji-Q proves that it can be done.
The video shows two stone-faced, suit-wearing, and completely silent executives ride the Fujiyama roller coaster, the park’s main attraction.