Me parece bestial:
#5 sera la cola de los gases del cohete https://www.google.es/search?q=propellant+trail&client=ubuntu&hs=tZP&channel=fs&biw=1408&bih=898&source=lnms&tbm=isch&sa=X&ei=Jrl0Vej6BIHiUZjSgdAD&ved=0CAYQ_AUoAQ#imgrc=4TjoKlJJK8FxmM%253A%3BPAWDKeUiulzhUM%3Bhttp%253A%252F%252Fwww.caelumobservatory.com%252Fgallery%252Frockettrail.jpg%3Bhttp%253A%252F%252Fwww.caelumobservatory.com%252Fgallery%252Frockettrail.shtml%3B2143%3B1388