Should we reenact that by fasting 3-5 days? Um, no. This is the kind of thought that gives Paleo/Primal a bad name. Eating in moderation - or short bouts of fasting - is good enough. We don't need to recreate Grok's situation. That's just silly. Interesting, but pointless.
Btw, I've been pig hunting - no food for two days. That was long enough for me.