The Engineer's behaviour... Clearer now than ever!

Alright. So... after watching the deleted scenes, especially the extended Engineer awakening scene. It hit me like a ton of bricks... Yes. We may have figured out the Engineer's basic rationale for ripping off David's cage, and doming Weyland with it... but. My explaination, extended scene. They seem to go along well :D. Once the Engineer awakens. He does take a good gander at everyone while in a crouching/seated position. But once all of his pressure suit tubing comes off, he bows. He bows to WEYLAND! For a specific reason. Now, mind you. I've said, he takes a good look at everyone. Now why did he bow to Weyland, you may ask? Well it's clear, don't you see! We've seen elder/old Engineers in the deleted scenes screen caps. And i believe that the Engineer saw Weyland as the elderly man he clearly is. And he bowed to him, specifically! For a reason. The aforementioned elder Engineers. They clearly have a specific role amongst the Engineers. And like all elders, are treated and looked upon in a different way. Even in the Engineer society. Although in their own way, of course :D. Weyland's old age, combined with the Engineers' outlook on the elderly is what got Weyland killed... DEFINATELY! It HAS to be it! The Engineer must have seen Weyland's request for more life/immortality as an insult amongst the Engineers! His demands must have sounded completely absurd to the Engineer. And his response sure as HELL wasn't "what are you doing here?". David must have said that out of modesty. Either way. It's clear now. And i'm certain that is the Engineer's reasoning. If Shaw had asked her questions, i have no doubt in my mind that the Engineer would have walked over to his coffee brewer, and carried on a conversation between the group. ****ing WEYLAND! DUMBASS! AAAAARRRRRRRGH! Thoughts, thought?