HONOLULU — A United Airlines flight turned into an absolute nightmare for hundreds of people, after the plane's engine began falling apart mid air.

ABC reports that the Boeing 777 plane was carrying 363 passengers and 10 crew members when it left San Francisco for Honolulu Tuesday morning.

Passengers heard a loud boom 40 minutes before landing, and were shocked to see the engine cover falling off the plane.

The aircraft began shaking hard, prompting the captain to warn of a possible rough landing, and leading some people to think they were legitimately doomed.

Thankfully, the plane landed safely in Honolulu and passengers were able to deplane normally.