Four happy bank robbers enter a bar to celebrate with a pint each - alas they entered the wrong bar. Hell bent on not spilling any beer the cops&robbers chase is held on foot instead, with all the classic car-chase angles and slow-mo hill jumps.... except it looks a lot sillier when it's four blokes running with beer in hand. Carlton. Made from beer. So was this idea, most likely.
and of course, they have a CarltonDraught facebook page.