Well, it depends. Some Titans are only 3 meters tall. [Eren turns the water off and hops in the tub and akdslhfkh it feels good. Way too good. This is not normal. He sinks down up to the gills, though he breathes through his nose because uh what] But yeah. You have to injure yourself with a goal in mind. Even stupid shit! Like "I need to pick up that spoon". I bite my hand, or cut myself with a blade.