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Voiceover
In a reduced gravity environment polyurethane foam continues to climb out of the container.

Discussion
This is described in the article "Chemical Interactions in a Reduced Gravity Environment" cited below. The following is quoted from this article.

"Our third experiment examined the formation of polyurethane foam during micro gravity. This was done by combining two liquids in a small container, mixing, and watching the differences in polymer foam formation resulting from differences in gravitational pull. In a 1-g environment the foam rises out of the container in a uniform fashion, forming a cup-cake-like shape around whatever container it is in. This formation was not observed in a reduced gravity environment. The foam did indeed rise out of the container, but continued to climb without falling or being pulled in any direction. The energy provided by the reaction provided the only directional push applied to the system."

This article is available on CCA! 5 as a PDF file. Viewing and printing of the article requires Adobe Acrobat. A link for downloading the free Adobe Acrobat Reader software is on the CCA! Download page.