Pro-surfer Bethany Hamilton, who gained international notoriety at age 13 after a shark attack caused the loss of her arm, just celebrated her birthday while nine months pregnant with her second child. She marked the occasion by going skateboarding. In an Instagram video, Hamilton can be seen effortlessly carving up a road on her skateboard with her baby bump on full display. “My birthday skate session! Cement waves,” she wrote in the caption. While plenty of people remarked in the comments at how impressive it was—and how amazing she looked doing it—others pointed out that skateboarding isn’t really recommended when you’re pregnant.