def move_sibling_next(self):
        """
        Jump to the next comment that's at the same level as the selected
        comment and shares the same parent.
        """
        cursor = self.nav.absolute_index
        if cursor >= 0:
            level = self.content.get(cursor)['level']
            try:
                move = 1
                while self.content.get(cursor + move)['level'] > level:
                    move += 1
            except IndexError:
                self.term.flash()
            else:
                if self.content.get(cursor + move)['level'] == level:
                    for _ in range(move):
                        self._move_cursor(1)
                else:
                    self.term.flash()
        else:
            self.term.flash()

        self.clear_input_queue()
Jump to the next comment that's at the same level as the selected
        comment and shares the same parent.