There is no cause for alarm
"Some of you on the right side of the plane may have seen big chunks of metal fly out of the no2 engine....
... however there is no cause for alarm because we still have one good engine and we are only 2500 miles from the next suitable runway...
... despite the fact that the no1 engine appears to be holding together right now, you may be reassured to know that we carry a small stock of polar bear repellent and shark repellent"