Unsuited Space Jockey?

Looking at the size of the SJ in Alien and then again in the trailer isn't this dude the Space Jockey before he enters this "machine"? The size of the humans in the Alien picture are half the size of the SJ so this dude in the Trailer must be huge. [IMG]http://i40.tinypic.com/2lbm5h5.jpg[/IMG] [IMG]http://i41.tinypic.com/14jp0fr.jpg[/IMG] [IMG]http://i41.tinypic.com/15x8j88.jpg[/IMG]