[Matt Bonner]

Hi,

Maybe check out this link
https://www.centralsource.com/blender/explosions/

And you will need to download Blender 3d to render the animation.

Cheers

[Matt Bonner]

Another shortcut to slowing down your footage:
hold down ctrl key and drag out your video clip to the right in the timeline.

If you want to speed it up – drag the clip back to the left.

Cheers