Joe flips out over GI Joe

"I admit that I’ll never be as excited about anything as Joseph Gordon-Levitt is about “G.I. Joe.” Seriously. Asked a question about the movie, the man who would be Cobra Commander displays a level of excitement about one step below needing Lithium".
Source: moviesblog.mtv.com

Also watch this video with Joseph Gordon-Levitt From A Soldier's POV ("Stop Loss"):