A way to keep trails there?

I was looking for a way to keep trails in an area, such as smoke, still there after the rocket that they are connected to is destroyed…I usually just attach a small prop, turn it invisible, with a few invis. thrusters and dynamite bits, then launch it. This works, except the small prop cant be destroyed, so when it falls, it leaves another trail that often ruins the illusion… Id prefer the trail to just stay there after the rocket was destroyed…

Use a prop that’s breakable. Like a wood gib or something.

But when it explodes, the wood would break, and the trail would dissapear, which is what Im trying to avoid…