When I was at Caltech in the '50s, where was a sport called crew racing. It was a beer-drinking relay race: when you had drained your mug, you brought it down on the shoulder of the next man in line, who then drained his.

It was discovered that you could do better than merely pouring it down your throat with swallowing, if in addition you used your belly muscles to expand your stomach & thus used a pressure difference to accelerate the beer. IIRC, some people could empty a 20-oz mug in 1.2 seconds.