You wouldn't think that finding out how to carry a mug of coffee without spilling it would be a subject for analysis by scientists, but you would be wrong. Rouslan Krechnetnikov took it upon himself to solve this disruptive daily issue.
This area of study dawned upon him when he watched people struggling with mugs of coffee at a fluid dynamics conference. He thought that the solution wasn't simple. It was a complex scientific problem. The coffee carriers gender, age and health would affect the solution.
Tests included walking in a straight line with coffee in hand while looking at the mug or looking ahead. A sensor in the mug measured spillage of coffee. Conclusions were that one should walk slower and, wait for it - watch the mug not where you are going.
This sounds like advice leading one to disaster. "Watch your heads and laps everybody someone's coming who doesn't know where he's going! Why don't you get a cup you fool?"