making ground units explode when damaged

[Smokeythelung]

I'm guessing this is way more difficult to achieve than I can imagine

On the off chance that this is not to complicated to explain, I thought I'd ask.

Basically I want to achieve the same effect that's seen in a few of the stock missions, and countless ww2 guncams, where a lucky bullet causes a massive fireball. I'm hoping to achieve this with a moving train, a maybe a few other assorted ground vehicles.

If it's not already clear, I have no idea what I'm doingso please don't be afraid to tell me to stop being foolish and click on the "pack with TNT" checkbox that I've clearly missed in the object browser