In this situation, Huck is trying to be impressive. He is trying to get the point across that he is funny and "cool". This lie is not only the one of a kind for Huck, but also one where he tries to push his reputation past its limits.
I would have to go with his because he owns it
his jacket
its his possession. <span />
The answer would be direct object and if that's not a choice then just object because a noun can be a thing so therefore it can be an object.
Hope this helps ;)