 It's just very, very mental. So there is a lot of... You have to, you know, break through the part of you think that you need to breathe, which your body actually doesn't need to breathe at certain points. You can hold your breath for a long time, but it's just your mind that wants you to break that and take a big breath. So it is very mental. It's training for that. It's, you know, I...