As creepy as it may be, coconut crabs "hunting" in this manner--let alone being caught on film--is truly rare. I grew up hunting them with my brother as a kid, crawling along cliffs where they can often be found hiding, and in the jungle near beaches. They truly are an exotic delicacy (fruit bat and sea turtle are the only other things I've tried that come close on the exotic scale, the former being prepared in a similar manner)...which also means they don't live long lives outside of wildlife reserves due to being overhunted by indigenous peoples.