Possible Clues:

• You always get that after the death of a salesman, for instance, as there will be no show after this
• You'll see it at the end of 18 across, for instance, and there's nothing to show after that
• Symbolic end as lunatic in RAF crashes
• The manager calls for the last draw and the players are expecting it when it's all over
• It's staged managed at the end of Juno and the Paycock, for one
• Last seen hanging from window after Armageddon perhaps