A social media post that says: Reasons for always having a jar of vegemite in your survival kit: - lasts forever - Easy umami flavoring - Good source of B-vitamins - Deters dropbears - Contains enough salt it can be used to create or repair circuits There is a reply: "holy shit, it works!" and the three pictures of a piece of toast with some vegemetie "traces, assorted LEDs and a battery to light them up.