The Ig Nobel Prizes honor achievements that make people LAUGH, then THINK.
The 2021 Ig Nobel for Physics was awarded to Alessandro Corbetta, Jasper Meeusen, Chung-min Lee, Roberto Benzi, and Federico Toschi, for conducting experiments to learn why pedestrians do not constantly collide with other pedestrians.
REFERENCE: “Physics-based modeling and data representation of pairwise interactions among pedestrians,” Alessandro Corbetta, Jasper A. Meeusen, Chung-min Lee, Roberto Benzi, and Federico Toschi, Physical Review E, vol. 98, no. 062310, 20188.