We were on a AA DC-10 SJU-DFW once when a passenger had an emergency, and we did a very quick spiral into MIA. The crew handled it very professionally.
(For me, these are the times I discount those who say the FAs are merely glorified servers and anyone could handle an emergency - I have been trained as an emergency responder and have participated several rescues, when most folks who were not trained either gawked or freaked.)