"Terrifier" star David Howard Thornton got clown on one knee and popped the question to fiancée Jada Christine — while he was in full Art the Clown costume and makeup. The two were attending the Huntsville Comic & Pop Culture Expo over the weekend in Alabama when Thornton, wearing his now iconic outfit from the hit horror movie franchise, is seen in video posted on Saturday crouching down. Christine puts her hand to her mouth in shock and excitement. As Thornton pops the big question from behind the black-and-white mask covering his entire face, he asks, “Will you marry me?” Christine responds, “Yes, yes, yes, I will!” She then gets down to his level and kisses him on his black rictus grin as the couple hug and smile. Thornton and Christine have been dating for nine months. Christine posted on her Instagram story on Sunday, “I dont usually post snarky things, but this made me laugh.…