Just rewatching Bernardo's goal again - it really is perfect. Best view is from a high camera from behind Villa's goal. You can see the way Villa are sucked in, they think they have a chance of regaining the ball from Mahrez and Cancello and so they are looking forward and ignoring Bernardo who already knows there is a chance emerging.
As the Villa cross comes over, Bernardo and McGinn are together, close to Sterling who is still on the floor after being fouled (great advantage played by ref! :-) ) Jesus is in the middle on the edge of the centre circle covered by two centre backs. As the ball comes to Mahrez, McGinn starts to edge forward, perhaps hoping something will break for him on the edge of the box. Bernardo, slips behind him. As the ball is flicked through the gap towards Fernadinho. Mings makes the mistake of moving forward to intercept, but that puts Jesus behind him - Jesus and Bernardo are now into full sprint, Bernardo taking time to check he is staying onside - Konta knows where Bernardo is and is signalling that he needs some help - Fernandinho's pass leaves Mings stranded and Konta has to cover - it's at this moment that McGinn realises that Bernardo has a 30 metre head start on him - he busts a gut to get back, but there is no chance, not unless Bernardo decides to being the ball down before shooting or the cross is wayward - but of course the pass is perfect and that gives Bernardo the chance to hit the most wonderful volley you will ever see. Lovely, lovely stuff.