Leon Hanika is a German champion in the sport of canoe slalom, which is navigating rapids in a kayak or canoe. In this video, he is navigating still waters, but it is still a perilous feat. Hanika must ensure that he does not drop his beer in the water as he rolls his kayak.
Without the use of a paddle (that's the advanced version), Hanika rolls his canoe, switches his beer between his hands, and returns to the surface without spilling much of it. Then he takes a celebratory drink.
We have a similar sport here in the South, except that we use ATVs.
-via Born in Space