With one tap on his space bar, Andrea Stocco fires the cannon on his computer game and blows a rocket out of the sky.
The game itself is unremarkable - in fact it looks like a relic of the 1980s.
What is remarkable is the way it is being played because the University of Washington researcher can't actually see it.
The person who can, fellow scientist Rajesh Rao, is sitting across campus looking at the screen.
He is wearing a cap with wires coming out of it (which looks like something you might have seen in a 1950s sci-fi programme that was imagining this moment).
Without moving a muscle, or using a communication device, Mr Rao told his colleague to fire the cannon at just the right moment.
The only thing Mr Rao had was the power of his mind, so, at the right moment, he imagined firing the cannon.
This sent a signal via the internet to Mr Stocco, who, wearing noise-cancelling earphones (and a purple swimming cap) involuntarily moved his right index finger to push the space bar.
