"The look on his face was incredible," Kephart, 25, told The Register-Guard newspaper (http://is.gd/I9P2nA ). "I automatically handed it back to him; it was his ticket."
But the man wouldn't take the ticket and made Kephart sign it so she would be the only one able to collect the prize.
Kephart said 80 percent of her customers are regulars, and they were excited for her.
"The reaction was crazy," Kephart said. "Everyone was so amped up."
With the bar busy, Kephart went right back to work, her brain "scrambled" by the big tip. The next day, she claimed her prize at the Oregon Lottery office in Salem.
Kephart said she gave the man a percentage of her winnings. "I just couldn't not give him some of it," she said.
Kephart said she plans to buy a new couch with her share and save the rest. Those modest plans earned her teasing from the bar's regulars, but she had been looking for a couch before going to work Tuesday and was scared off by the prices.
"I never realized how expensive couches were," she said. "Instead of waiting till Christmas or later, now I can buy something I really need."
Information from: The Register-Guard, http://www.registerguard.com