I think the small white rectangle is his shirt cuff.
There! I said it. I didn't want to, but having looked at videos and stills until my eyes cross, that's what it looks like.
His shirt cuff? Please look at this video in the slo-mo version, the 2nd version, you might have to push the play button on this.
http://www.dailyrecycler.com/blog/2004/10/winners-never-cheat.html
It's very obvious that his left hand reaches into his inside jacket pocket on the right side.
What did he pull out? His shirt cuff? I don't think so.
Well, it looks like this will fade away. But even the pen was cheating.