Can the ‘spirit of sport’ withstand brainpower of superhuman performance?

We need to talk about transcranial direct-current stimulation.

What if I told you I could make you capable of scoring the winning penalty in a World Cup final, or holing the winning putt on the final hole of the Open Championship? You that would bottle a tiddler from three feet to win a fiver from your mates? And all you have to do is strap on a helmet that sends electromagnetic pulses into your brain.

Wait! Wait! Come back!