Copying my comment from a previous thread -

Flight from Dubai to Tel Aviv, details as known so far:

Omani second pilot stabbed the Emirati captain severely, and tried to crash the plane causing a dive from 34k to 15k in mach1.

The captain managed to take control back, and in the meantime Israeli passengers who have heard the commotion in the cockpit broke in and apprehended the Omani pilot.

A second flight crew on the plane landed the plane safely in Saudi Arabia, with a damaged tail from the dive.

They were supposed to be roleplaying as Captain Allears and First Officer Blunt

It seems like they had a slight CRM problem ...