Not exactly what you want to see as a passenger.
I wonder why they didn't shut the engine off. It was ON FIRE!
The core of a jet engine operates at thousands of degrees F...takes awhile to “go out”/cool down....(after all fuel is cut off). ;-) Yep, not want you want to see esp. in a 2 engine aircraft...fortunately the 757/767/777 series are certified by the FAA as “ETOPS” (safely fly four hours or more on one engine). See:
https://simpleflying.com/etops-certification-requirements/