Miss Grand Thailand pageant contestant had an unforgettable malfunction while on stage. During the preliminary stages of the pageant March 25 in Bangkok, 18-year-old contestant Kamolwan Chanago's veneers began to fall out of her mouth as she was introducing herself to the judges and those at home. As she was delivering her introduction, Chanago's speech became noticeably less clear as her false teeth fell out and affected her pronunciation. Chanago didn't let the mishap fluster her, as she turned her back to the audience to adjust her veneers before quickly turning back around and giving the camera her best model face. She then proceeded to walk down the runway and pose in her sparkly nude sheer dress and fluffy pink shawl, as the crowd cheered her on.…