Jay Leno’s chin is an easy (and big) target — and last night, Conan O’Brien took a swing at it while going over his options for what to do next.As we previously reported, Conan has three options, one of which can net him up to 80 mil– and no, “Hire Gary Busey as head of programming” isn’t one of the ‘em … though that would be awesome. -TMZ