After playing Infamous for a while then switching to Assassins Creed 2, I dropped off a ledge on a tall building in Florence and expected Ezio to gravitate to the nearest grabbable ledge. Only he didn't, and Ezio plummeted to his death. Unfortunately, Ezio refuses to grab onto ledges unless you press the right button, unlike Cole who can't help himself from clinging to everything he brushes up against.