Everyone is still waiting for Dato Seri Abdullah Ahmad Badawi's announcement. Read Malaysiakini today on the related story.
If Abdullah wanted to retain his position as Umno president, the Pakatan Rakyat would have to resort to casting no confidence vote against him in Parliament.
By virtue of Article 43(4), the Prime Minister shall tender the resignation of the Cabinet if he ceases to command the confidence of the majority of Parliament unless at his request Yang DiPertuan Agong dissolves Parliament.
There are 2 ways of passing a no confidence vote against the Prime Minister. Firstly, by giving a 14-day notice in accordance with the Standing Order. Then the whole whole will be waiting for the motion to be debated and decided. Secondly, by rejecting the budget tabled by the Prime Minister cum Finance Minister for which the budget debate will commence on Oct 13.
If the Pakatan Rakyat intended to launch a deadly ambush, the second method would be the better choice as no prior notice is required.
In any event, that would be equally explosive, like the one in Nagasaki in 1945.