Complex sentence: According to the show, a few days after Johnson egged the demon on during the exorcism, he was attacked rather viciously by the demon, which allegedly took control of his car and forced it into a tree; fortunately, Johnson was unharmed.
Split into simpler sentences: According to the show, a few days after Johnson egged the demon on during the exorcism, he was attacked rather viciously by the demon. The demon allegedly took control of his car and forced it into a tree, although fortunately Johnson was unharmed.