On disc 2, if you go to the sound setup menu, there will be a facehugger sitting on one of the speakers. Highlight him and watch. Also on disc 2, go to the documentaries section. Highlight the 1 hour documentary and then move your cursor left to highlight the chapter selections. Go all the way down to the bottom of the list, then look on the pipes above. Another facehugger is sitting up there. Move your cursor to the left to highlight him, then click on him to check out another trailer.