I'd attach my knife to a stick so I could get coconuts from the tops of tropical coconut trees. Wear my belt since, it's a belt. Then when I have enough coconuts I'd give them to the leader of the crab people. When I gained there trust I will dig a massive hole, carve branches into spikes and stick them in the hole. Cover the hole with leaves and such, then get MORE coconuts, put them on the leaves. Lead the crab people to my offering of coconuts, they fall in. I have an all I can eat buffet. Profit.