Okay since thankfully no one is going to Eagle Eye, the voice you hear on the cell phone ordering Shia 'Boof and Monaghan what to do is......
Edited. Nonetheless if some might see it....
**********Spoilers*******************
The US Dept of Defense and Bush Oil n War build this huge computer. It logs data on all of us, and is tied to cameras galore placed here there and everywhere in the real world galore. (Traffic cameras, electrical grid system, anything electrical/computerized.) The thing starts to think for itself AI style. Its been programed amoung other things seek out Enemies of the State, but it incorrectly i.d.s a big wig as a terrorist fronting at a funeral in the MidEast. Turns out it was just Skandery visiting and attending the legit funeral, but instead the computers data led the Bush chiefs to blow away the whole procession, like 30 in all. 'Boofs twin brother works in the same room as supercomputer, in fact he helps maintain it. When Boof Twin figures out the computer is going haywire, the computer (given some chicks name), senses BoofTwin has its number and has him taken out. Then it hatches some huge plan to have 'Boof and Monaghan do its bidding. That was a slightly interesting twist. In the end two workers drain the liquid nitrogen coolant out of Supercomputer and stop it just before it blows the world to smithereens.
