This might be a repost, but its pretty damn funny.
http://www.youtube.com/watch?v=8yT48wiRue4
And I just wikipedia'd him. Apparently,
In December 2009, Johnson revealed that he had been battling Hepatitis C for over a decade, which resulted in slow speech and a tendency to regularly get "lost in thought in the middle of a discussion".[24] Johnson said that he learned he had the disease in 1998 but does not know how he contracted it. The disease has damaged his liver and led to thyroid problems.[24] He was treated with a combination of ribavirin and interferon at Walter Reed Army Medical Center.[24] In February 2010, Johnson finished an experimental treatment for Hepatitis C, resulting in weight gain and increased energy.[25]
Which would explain part of that. But still... Wow....
