There was to be no discussion on why he left.
From articles the rider :
60 years old (another story says 59)
"He took his helmet off and his hair was singed," adding the inside of the helmet showed obvious signs of being hit by lightning.
This link has a picture showing bike and rider http://www.kptv.com/story/23352247/ride-the-lightning-man-on-motorcycle-hit-by-lightning-bolt-on-i-5
The man from Tenino, WA has not been identified
See pics of bike - Honda FB6 I believe - http://www.katu.com/news/local/Motorcyclist-struck-by-lightning-along-I-5-in-Washington-222578571.html