What idiom of improbability most accurately describes when construction on the Nova Centre will finally be finished?

When hell freezes over

41 votes (12.97%)

When pigs fly

42 votes (13.29%)

The Twelfth of never

77 votes (24.37%)

When great Birnam wood to high Dunsinane hill shall come

66 votes (20.89%)

It will never stop

90 votes (28.48%)