Not even a broken boot could stop Australia back-row forward Sean McMahon making an instant impression Sunday as he marked his Japan Rugby Top League debut with a try.The 23-year-old Queenslander, who has already won 28 caps for the Wallabies, touched down in the 13th minute against Kobe Kobelco Steelers and set up a try for Matt Giteau as he played the first 40 minutes in a pair of modern lime-green boots.Having punctured the front of one of those, McMahon then played a further 12 minutes in the second half in an old fashioned pair of black boots -- "that I always bring along in case somet…READ FULL ARTICLE