Honestly I think he's a straight up pussy for fighting it restrained like that. Kangaroos are mean basterds, example:
http://www.foxnews.com/scitech/2009/11/23/kangaroo-tries-drown-man-dog/?loomia_ow=t0:s0:a16:g2:r1:c0.197937:b29014848:z10
I wouldn't mind a man fighting a kangaroo fair and square, because frankly the kangaroo has the advantage (they use the powerful hind legs to grip and then tear their opponents apart).
http://www.foxnews.com/scitech/2009/11/23/kangaroo-tries-drown-man-dog/?loomia_ow=t0:s0:a16:g2:r1:c0.197937:b29014848:z10
I wouldn't mind a man fighting a kangaroo fair and square, because frankly the kangaroo has the advantage (they use the powerful hind legs to grip and then tear their opponents apart).