I'm an admitted JT fan. The guy's been doing duets with pretty much anyone lately, but you have to admit that the songs are still rather catchy.
But, have a go at this video (ayo technology, 50 cent feat JT), fast-forward to 02:13 (till about 02:16), and look for JT in the background.
Did you see that? Did he just do that? What the hell was that?