Way to keep a movie low-budget and still have a great story line. Jake Gyllenhaal was a stellar choice for the lead. Unfortunately, I just couldn't get past the plot holes. For example, if no victim saw the bomb in the ventilation shafts, how was it possible to have it digitised in the source code? Shouldn't there have been pixelated glitches in the memory bank? Nonetheless, a good film with a decent ending.