Best way to make explosions for android devices? (tegra 2 and higher)

I want to create explosions for an android game, but am unsure what to use to accomplish this. I looked into detonator but sadly found out it is not optimized (or supported) on mobile devices. I also think particle systems will be costly.

What is the best way to make an explosion on mobile devices (that does kill framerate)?

Anybody have a clue? I just need a general method not using the detonator example from the unity website…