Throughout Dead Money, Elijah points out how he can kill you so easily with the push of a button. But around the end, if you lock him in the vault/fight him why doesn't he just kill you with a click of a button like he always threatens? I mean, if I were locked in a Vault by someone I could kill so easily, I would. :3 Why would Elijah even need to fight you? He could just blow your head off and get what he wants from the Vault.

But besides that, how does your collar come off at the end of Dead Money? Elijah doesn't have the ability to take it off of you because he's either dead, or locked up. Unless the Courier gets the random ability to take it off just as he always has throughout the Mojave? xDDD

I just want a rational answer. ;3

To the issue of him not pushing the button. He explained that it was something about what the Casino was made out of that interferes with the signal, thus making remote detonation impossible. :shrug:

To the issue of the collar magically coming off, I like to think that The Courier remembers how to disarm them at the end. :rofl:

He got the collar off the exact same way dog did. He also didn't blow up the collar because (what Ruined said) and Dog/God is still in the kitchen filled with gas?