[webwielder]

Perhaps even more impressive than Carmack's technical chops is his ability to stand in a single spot for hours on end.

[31reasons]

Because all the cycles are allocated to the verbal system rendering motor system immobile.

[omegant]

I almost chocked when reading this.

[morkfromork]

He moves but, is too fast for the camera speed.

[DonHopkins]

He takes bathroom breaks during vertical refresh.

[azernik]

John Carmack facts!

[mlvljr]

No, the trick is just that he is interlacing himself, didn't you notice?? (otherwise he would flicker, obviously)

[ckeck]

I was always impressed by this during several of his keynotes at QuakeCon the past few years. I believe it was 2012 when he was standing next to the chair talking and didn't seem to flinch for almost 2 hours straight.

[rmcpherson]

Without a podium, he does look absurdly immobile on that large stage.