The thing about it is that they change the whole Predator culture around their weak-a** plot...
You're right Silverpaw the self-destruct is in fact a self-destruct, you're not suppose to be able to detact it at all... you either fight to live or die and take out everything around you in the process...
The Predators can remove their armor but if the writers had stuck to the original story, they wouldn't have had to (seeing as how their metal is acid resistant and all that), another thing is the predator took off his mask to mark himself wtf! They don't do that, ever..
If they had stuck to original story line, the movie would have been so much better, but alas they didn't
The comic might be had to get a hold of it's been out ever since Predator 2 came out so yeah...
I'm not try to start a heated debate over the movie and I'm not mad, it's just that it really hurts to see that much potenial wasted...