Edit: Unfortunately, the images originally included in this post are gone, because of hosting problems in late 2009. My apologies.
I got to see a gibbon once at a rehabilitation center for primates. Most of the animals had been pets and were desensitized to people, and some had been abused, which was sad. One gibbon followed us around the whole park, holding our hands and walking (or swinging) alongside us … and reaching into pockets and taking keys and things.
So for me anyway, calling it Gutsy Gibbon gets a +1. ;)