What I'm curious about is everyone's thoughts on the minimum weaponry necessary for a healthy adult male human to successfully beat a chimp.
The odds of ever getting attacked by a chimp are pretty slim, but not exactly zero. There was the Travis incident where the owner's friend was attacked. But there could have been an incident where someone who keeps a pet chimp leaves the door unlocked and the chimp gets out. And you happen to be on the sidewalk right in front of the house as soon as it gets out.
Running is not an option. You cannot outrun a chimp. You can't climb anything to get away the same way you would if a dog were chasing you, because chimps are vastly superior to humans at climbing.
If you had a regular spring assisted knife, do you think you'd be able to fight off the chimp with it? What about an extendable baton? Is it possible to defeat a chimp with anything less than a firearm?