Yeah I don't really buy into the fact that James Thompson has a Glass Chin, A Glass Chin defined to me is that you take 1Shot and Go down.
Lets take a Look at his Knockout Losses
Aleks Emelianenko - He wasn't really Knocked Out in that Fight, If you take a Look at Alek's Fight with Morais, now that was Knocked Out.
Fujita - He took at least 20 Hard Shots from Fujita, the man who almost KO'd Fedor in 1 shot.
Butterbean - Knocked out by a Pro Boxer who holds the World Record for Fastest Knockout
Neil Grove - He just Ran into the Punch that would Knock anyone out
Brett Rogers - He took 6-7 clean shots and then went down, who wouldn't get Knocked Out by those Shots. Brett Roger's is a Beast
Kimbo - He wasn't even Knocked Out or Down, Kimbo was Hitting him his Hardest and still couldn't Knock him out
I think It's JT's Un Technical Stand Up and not his Chin that Knocks him out, If he was Techical, I think he wouldn't lost some of those Fights