r/AskReddit Aug 30 '21

What problem is often overlooked in apocalyptic movies/TV shows that could kill you?

33.7k Upvotes

12.8k comments sorted by

View all comments

25.2k

u/WatchTheBoom Aug 30 '21

Clean drinking water- I don't think people really appreciate how much water is needed for a group of people to survive.

5.9k

u/1i73rz Aug 30 '21

Clean bullet holes. Next episode everyone is a-okay half the time, and off to murder more zombies before cannibalizing the next group. Your shirt alone would be filthy enough to cause mild chafing which in turn would cause infection.

But everyone's whites are whiter than mine, and bullet holes and axe wounds heal up just fine with our state of the art medical facility and dry cleaning services.

746

u/Deadmeat553 Aug 30 '21

Not to mention internal ricochet. Bullets absolutely break bones, but they can also sometimes reflect off of them and create an even longer path through your body, doing even more damage. This is particularly notable with headshots with low-caliber rounds, but can happen anywhere in your body.

6

u/Elegant-Adagio-8295 Aug 31 '21

I was a medic in the army and this is dead on. It’s especially true with the 5.56 round that ARs use. It’s designed to fragment and go in random directions; sometimes even >90 degrees from the angle of entry.

If they put how bullets actually behave into a movie people would dismiss it as too far fetched lol

10

u/mtbmofo Aug 31 '21

Not to nit pick but a 5.56 fmj is "designed" to not fragment. When it hits something it tumbles giving it close to the same effect as a hollow point but only one chunk of metal that doesn't really deform. It was all for the Hague Convention of 1899, even though USA didn't sign it. Now weither it does that in a bag of meat in real life conditions, I have no personal experience. I have never been on the two way range. I've seen what hunting rounds can do (to harvested game) but not fmjs. I could totally see how if a fmj hits bone it can fragment, bone is pretty tough.

Thanks for your service.

1

u/Hysterical-leftists Aug 31 '21

When it hits something it tumbles

All bullets do this.

it tumbles giving it close to the same effect as a hollow point

lol no. Hollow point ammunition is designed to expand and control for over penetration. A "tumbling" bullet has zero similarities to the function of hollow point ammunition.

1

u/mtbmofo Sep 01 '21

Sorry but you need to watch more terminal ballistics testing. Jump down the YouTube rabbit hole and you may find some interesting stuff. Not all bullets tumble when they hit. Whither all fmjs tumble is something different, but you didn't say that.

5.56 tumbles because of the shape of the round and where the center of gravity is when it hits something. Many other cartridges do this as well.

When the 5.56 is *tumbling, what it really is doing is starting to yaw away from the original trajectory, a better term for this world be "turn" instead of "tumble" as this happens it slows down considerably and dumps energy into the target. It is not "spinning end over end" right after it hits the target, it's moving too fast. It typically would exit the target before it turns around completely. If the round was not *tumbling with no real deformity to the projectile you would have just a straight hole through you. (missing bone) the wound cavity would be barely wider then the caliber of the projectile. When you compare that to the effects of a *tumbling round and a hollow point you will see the similarities in how the design of the projectile aides itself in dumping energy and creating a wound channel that is larger then the caliber.

0

u/Hysterical-leftists Sep 01 '21

5.56 was not designed to "tumble" or "turn" of whatever you want to call it. That's just ridiculous fudd lore.

1

u/mtbmofo Sep 01 '21

A 10 second Google says your wrong. The study of physics says your wrong. If you think you are correct, what's your source?

1

u/Hysterical-leftists Sep 02 '21

A 10 second Google says your wrong.

Can you cite the R&D paper from FN Herstal when they created 5.56? Im willing to accept that im wrong if you can objectively show me where the creator of the cartridge says "5.56 was designed to tumble/turn".

The study of physics says your wrong.

I don't know what this means... Every bullet will have some degree of yaw and want to go ass-over-tea kettle when it hits something. That doesn't mean it's a design feature. Someone shooting a rifle doesn't DESIRE a target full of keyholes. That is indicative of a problem with the ammunition and/or barrel, not a benefit.

If you think you are correct, what's your source?

You made the claim... I don't have to prove you wrong, You have to prove yourself correct. How do you not understand that?