I tried to find the best Quality I could find, I will post another five if I find some, so you don’t have to post other Explosions!
(You can also tell me a Movie which Contain Big Explosions)

1. Angels & Demons – Anti-Matter Explosion above Vatican City

2. Knowing – Solar Flare destroying Earth.

3. Watchmen – Big Blue Shockwave in Middle of City
(Don’t know which City, somewhere in America)

4. Terminator 4 Salvation: Nuke Bomb on Battlefield while John Connor sitting in Helicopter.
(Could not find the Nuke on the end of movie)

5. 2012 – Yellowstone Park Vulcano Eruption 50KM high with Ash Clouds