imagine this...

go to editor
place unit (player)
place like a wreck (skoda?)
go to modules then place the module called effects
enter the module and select smoke shell or something
place this over the wreck or object.
make a trigger with the activation as "anyone" and make the size something like 8 by 8
click preveiw
walk up to the wreck and smoke will start to appear from it..

now if this was something like a grenade round or explosive charge or something
then it would go bang :D there you go simple IED or whatever.

you would be able to use these for many types of things
first thing being IED! as you can sync these to triggers over like an object :)

please note i already know that IED script is possible but i do not want to have to do this all the time as you have to find the round classname and remember the script and just annoying.