Firstly, if you reveal anything about the game please put [SPOILERS] at the start of the title and warn people there is some contained in your post, just so you don't ruin the story for people who haven't played it yet.
Secondly, Ezio did not run away, he attempted to prove their innocence and was to late to reach them before they were hung, he ran after they were all dead and a giant guard came up to his with a huge weapon and he was unarmed.
Lastly, those feathers are a pain in the ass.