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The Ig Nobel Prizes honor achievements that make people LAUGH, then THINK.

In the Ig Informal Lectures, some days after the ceremony, the new Ig Nobel Prize winners attempt to explain what they did, and why they did it. We released these lectures one at a time.

In Podcast Episode #1094, Marc Abrahams presents the 2021 Ig Nobel Prize for Kinetics winners Hisashi Murakami, Claudio Feliciani, Yuta Nishiyama, and Katsuhiro Nishinari. They received the prize for conducting experiments to learn why pedestrians do sometimes collide with other pedestrians.

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• REFERENCE: \\u201cMutual Anticipation Can Contribute to Self-Organization in Human Crowds,\\u201d Hisashi Murakami, Claudio Feliciani, Yuta Nishiyama, and Katsuhiro Nishinari, Science Advances, vol. 7, no. 12, 2021, p. eabe7758.
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The video for this lecture\\u2014graphs, charts and all\\u2014can be found online at www.IMPROBABLE.com.

Seth Gliksman, Production Assistant