I seem to recall a case in London quite recently where a teenage girl killed another girl with a metal afro comb- so I guess that does the job.
Back in the 70s, "we" used to have classes on how to use the objects that we carried as weapons. Typically these were keys, combs, pencils, shoes, newspapers (you probably know all the tricks). There were lots of different uses for combs because there were so many types.
Yeah, the multi-colored rattail combs are usually plastic. The better ones are stiff, though. As you pointed out, all of these would be relatively useless in a blindside blitz attack. My point was that confidence comes from not feeling helpless. Having the weapon, however, doesn't imply the ability to use it --either physically or mentally.
Anyway, a frontside blitz is completely different from a blindside, especially in terms of "freeze" responses. I agree the the guy in the vid that it is necessary to go "from 0 to 100" instantly. The question is "when." For a blindside, the answer is "immediately." Go absolutely buck wild crazy. Yell, scream "fire", punch, kick, bite, scratch, anything and everything possible. Sure, if you're strong, have endurance and have training, your chances are better. If not, though, there's nothing to lose. You've no idea why you're being attacked, so the assumption should be that it's life or death.
A frontside blitz is a different type of ambush. You see it coming. So, there is time to prepare ... and to freeze from uncertainty, if not from fear. Imo, it's a more difficult decision because it is a choice. Going from 0 to 100 at the wrong time could be a disaster. This is where having a plan, or plans, is vital. Otherwise, you're just a time bomb. I shouldn't say "just".
Anyway, we can talk about that period when the words have started flowing, but the fists haven't. Note how the big guy starts to play with his prey's head. Clue one: he repeats himself. Tip: he's doing that because something else is on his mind. Imagine if he had a gun in his hand, would you still just stand there? Clue two: watch for something that can hurt you, and try to protect what it can hurt most. As I've argued before, people don't usually just walk up to you with a knife while striking up a conversation. The latter happens in the school yard or among males who like the same female, usually without the knife. That's why the situation is a bit contrived. The other guy "could" have attacked or run away or even just put his hands up, which he just might have done in another circumstance.
"A man is rich when he has time and freewill. How he chooses to invest both will determine the return on his investment."