Deathdrop,
Yautja,
12 years ago
From what that guy on AvPgalaxy was saying, the effects depend on WHY it's being used more so than who's using it.
In other words, the stuff somehow reacts to intent. If you're willing to sacrifice yourself, it can be use to create life, but if you're using it selfishly, it creates abominations.
Could it be the Engineers know something we don't concerning meditation? The one in the opening seemed to be performing some sort of ritual (the cloak, the "grail" he drank the liquid from, the ship, kneeling, etc.) that would have required a good deal of concentration. He's about to die to bring about new life. It's pretty heavy stuff, and he treats it with the respect it deserves.
When you dick around with it, though, the results are less than pretty. Basically, you have to know what you're doing when you use it. Is this making sense, or am I babbling?