All sounds CC-by-sa Julien Jorge, produced with the following samples.

explosion-1:
CC-by smcameron http://www.freesound.org/people/smcameron/sounds/51464/

explosion-2:
CC-by Omar Alvarado http://www.freesound.org/people/Omar%20Alvarado/sounds/93741/

explosion-3:
CC-by steveygos93 http://www.freesound.org/people/steveygos93/sounds/80401/

explosion-4:
CC-by smcameron http://www.freesound.org/people/smcameron/sounds/51467/

explosion-5:
CC-by smcameron http://www.freesound.org/people/smcameron/sounds/51429/

long-explosion:
muffled-explosion:
CC-by steveygos93 http://www.freesound.org/people/steveygos93/sounds/80401/

