Don't worry about Johnson's knee. Daryn Cresswell's knee was halfway off his leg one day and he belted it 6 or 8 times until it went back into place. I still remember it, and he didn't miss any games at all.
http://www.afl.com.au/news/newsarticle/tabid/208/newsid/76771/default.aspx
http://www.afl.com.au/news/newsarticle/tabid/208/newsid/76771/default.aspx




