Rob, my 1ºquestion is from William Gibson alien 3 script ,not from David Fincher movie , not forget in alternate version of Alien³ (the "Assembly Cut") , alien burst fram Babe ox rather the dog. In script Williiam Gibson, the Biological Warfare division from, Anchorpoint , under developing alien warriors , from ther on ,in base ADN samples,from legs Bishop , after he have fisic contact in the Alien Queen from Aliens.But the clone expermet ,result in outbreak airborne virulent contagion, creating Aliens virus. The human infeted turns in Alien, but not all infeted turn Alien,some cases. In these cases ,the aliens chestbursters burst from host ,in same old fase away Chet predalien jr.Queen ´s chestbursters done thier host. But ani way, thanks.