He was up in Wisconsin, campaigning on a whistle-stop tour, in 1992. At that point in the campaign, it was increasingly clear he was going to lose. A local reporter asked him how the train trip from downstate was going. Bush had just been on a whistle-stop tour in Louisiana and a family had stood next to the tracks all dropped trou as the train passed. Bush responded to the Wisconsin reporter, "Good. Nobody's mooned us up here."
Many other examples of his sense of humor, including inviting Dana Carvey to the White House a month after he lost, which indicates a sense of humility, too.