Some brilliant use of old footage and moving photos here from Guinness in their new 'David and Goliath' ad. It features Munster's historic win over the All Blacks in 1978 and would make the hairs on the back of your neck stand up.
https://www.youtube.com/watch?v=CyNWKsuchaU
Actually why you're here – and this is no disservice to Munster – Malcolm Gladwell has an interesting insight into the story of David v Goliath. He explains that David should have always been considered as the favourite. Here's why: