I wondered why I never saw the weather lightning in Quake. So I took a pix into fimg and ended up 
here.
 
 As a static model keeps on going I stated the last frame on
 
self.nextthink = time + 10.0
 which is a blanc frame so it isn't vissible.
 
 So now I have a weather lightning within 10 sec.
 breaking my head how to add sound and light simultaneously.
 
 File is on quaketastic/models/bliksem.zip