#define health     skill100
#define id         skill99
#define id_barrel  1234

void _event_barrel(){
   if (event_type == EVENT_SCAN || event_type == EVENT_IMPACT) if (you) if (you.id == id_barrel) my.health = 0;
}

//skill1 BarrelHealth 100
action BarrelExplode_WED(){
   set (my, POLYGON);
   my.id     = id_barrel;
   my.emask |= (ENABLE_SCAN | ENABLE_IMPACT); // impact: 4ex use ents as bullets ( 4my taste better than using c_trace btw )
   my.event  = _event_barrel;
   if (my.skill1) my.health = my.skill1       // takes value from WED's settings panel
   else           my.health = 50 + integer (random (50));
   while (my.health){

      // if u want, add more code here. maybe barrel's idle animation lol

      wait (1);
   }
   my.event = NULL;
   set (my, INVISIBLE | PASSABLE); // ghostmode
   c_scan (my.x, my.pan, vector (360,0, 150 + random (250)), SCAN_ENTS | IGNORE_ME | IGNORE_PASSABLE);

   // put your "BOOM - code" here ^^ ...like playing explosion sounds etc.

 /*
   // example: wait until sound was played ( via handle )
   var _sndhandle = 0;
   _sndhandle     = ent_playsound (me, snd_explo, 200);
   while (snd_playing (_sndhandle)) wait (1);
*/
   wait (-1);
   ptr_remove (me);
}