Thank you for your question. When going into home plate, if there is a play at the plate, the runner is required to slide. This is a feet first slide, not head first. You are not allowed to run the catcher over. Technically, the catcher is also required to leave a part of home plate open. The idea is to avoid having the catcher run over. Also, by sliding head first, this can risk a head injury to the runner. This is also trying to be avoided.