Definitely Bob's fault , i was there and saw the whole thing , Bob's not telling the whole truth.
I can confirm he was doing around 10km per hour , but what he hasnt mentioned is , he had a small Leo beer in his left hand , his phone rang , probably his mate Pete and he answered it with his right hand. Exactly at the same time the Thai guy indicated to pull in and Bob with no hands on the handlebars stood on the rear brake and the Harley went down on its side.