I've done a lot of backpacking over the last 33 years.
I have never been attacked by a (supposedly) wild animal before, although there were some scary times: false charged by a black bear to within 8 feet on the AT in '95, rabid fox on the trail in Georgia in '89, jumped over a sleeping brown bear in CO in 2001 after jumping over a blowdown who then turned on me but then thought and changed his mind, etc.
BUT, yesterday, I was attacked by a gibbon monkey in the jungle on my continuing trailblazing for a 100 mile long trail here in Phuket, Thailand. The encounter lasted at least 10 minutes and at one point, he jumped on my backpack and was pulling my hair!
Too long to post here so, here is a link to my blog entry about it.