Well, I've done these...
They're pretty cool. Can I see the originals?
That was the only way they worked in the post. But I've emailed them to Brad, so if they pass any tests required they should get up.
I've done some more...
And they appeared to have worked properly.
Crash. Bang. Krrrsh. Uhhhhn. Crash. Bang. Krrrsh. Click. Blam. Onomatopoeia.