When you feel like running out of something. Like when I write about something, I'm thinking that at a certain point I'll reach the limit of topics to write about, at which point you get repetitive. Like those people making soccer tutorials. From what I know, they make a video about the same topic every year, because they don't have something new to write about. Also, I have this feeling when I was running out of something, like when I was drinking a lot of soda, and I was watching the bottle being almost depleted, or my father running out of cigarettes. Is this scarcity?