They were all cave ins.
Mega Disasters - 2006 Earthquake in the Heartland 1-5 was released on: USA: 20 March 2009
Top Gun - 2009 VG was released on: USA: 5 May 2009
Top Chef Masters - 2009 Restaurant Wars 5-5 was released on: USA: 21 August 2013
Life on Top - 2009 Tied But Not Tied Down 1-5 was released on: USA: 30 October 2009
Top Chef Masters - 2009 Miniaturize Me 1-5 was released on: USA: 15 July 2009 Japan: 10 July 2012
Southland - 2009 Under the Big Top 5-4 was released on: USA: 6 March 2013
Top Chef Masters - 2009 Finale 5-10 was released on: USA: 25 September 2013
Top Chef Masters - 2009 Catch of the Day 5-7 was released on: USA: September 2013
Top 20 Countdown Most Shocking - 2009 Escapes from Death 1-5 was released on: USA: 31 October 2009
The 1556 Shaanxi earthquake The 1887 Yellow River flood The 1931 China floods
Read Right to Left - 2009 Top 5 Badass MANga Characters 4-5 was released on: USA: 31 July 2012