Most people think if they out of the red when the hit lands they should not get hit. When in reality you get hit if you was in the red as it vanishes. Same for Titan, If you was within landslide the moment the purple lines vanish, your hit. The attack animation comes after the position check. Is something you suppose to get used too and even use to your advantage. I sometimes have to take the first phase of Titan to explain this and demonstrate it, by walking out of the purple and as it vanishes walking right back into it.