Steve Huffman, co-founder and chief executive officer of Reddit Inc., speaks during a Bloomberg Technology television interview in San Francisco, California, U.S., on Wednesday, Nov. 9, 2016.

The most anxious day of Reddit CEO Steve Huffman's life was showing up to work on the Monday after Thanksgiving this year. The week before, he had thrown the company into a minor political crisis.

After weeks being antagonized by the users of Reddit communities like /r/The_Donald and /r/pizzagate, Huffman had covertly edited messages posted by other users that were critical of him, to instead be critical of those communities' leaders. On the latest episode of Recode Decode, hosted by Kara Swisher, Huffman said he conceived this as a prank, "in the spirit of fun."