Ubisoft's E3 2011 demonstration of Far Cry 3 was—obviously—not the only way to run through the jungle and get to the chopper. Flexibility and player choice are key in Far Cry games, which Ubisoft illustrates in the above gameplay demo.
It's the other way to skin the cat that was Far Cry 3's E3 showcase, plus some commentary from Ubisoft Montreal on next year's game. You can revisit the other way to complete this same objective, with commentary, afterward.
Far Cry 3 is on the books for a 2012 release on the PC, PlayStation 3 and Xbox 360.