Some of these are vulgar signified , but certainly deserving repeating .

As theancientsaying goes, “Experience is the best teacher.” Sometimes, though, what we learn through experience is to NEVER do something again because it resulted in a not-so-great outcome.

Recently, Reddit userAncient-Rub-6987wanted to hear about those experiences when theyasked: “What, due to experience, do you know not to f*** with?”

1.“People in the middle of a road rage incident. It is amazing how a grown adult can absolutely lose their mind when inside a vehicle.”

2.“Construction sites. They are one of the most dangerous places to be, so you have to be paying attention the entire time you are on-site.”

3.“Payday loans.”

4.“If you’re traveling, never mess with the locals. I’ve seen people pick fights with one of the locals, and 10 of his buddies came out from every shop around them.”

5.“Food poisoning. If you’ve ever had it for real, your own personal food safety standards will rise significantly.”

6.“Bodies of water in general. A floaty blew off the back of my boat, and drunk me thought I could dive in and get it. By the time I came up for air, it was 50 yards away, and after swimming in its general direction, I was too far from the boat to swim back. I was rescued by a quick-thinking kayaker. Never again!”

7.“Mountainous roads during or after a blizzard. I’ve seen a few people just die from turning corners too fast and hitting oncoming traffic. Bridges freeze and traffic backs up for hours. Seen plenty of cars spinning out on black ice.”

8.“Swans during mating season. Think about a goose on steroids and three times bigger. They’ve been known to chase down jet skiers and knock the driver into the water for getting too close to their nests.”

9.“Don’t mess with people who cook, deliver, or serve your food.”

10.“Tape measures. I ended up with 10 stitches.”

11.“Skiing or snowboarding past the out-of-bounds signs.”

12.“Driving tired. It can be WAAAAAY worse than driving drunk.”

13.“Internet trolls. They’ve literally got nothing better to do with their time and will take you down to a deep, dark trench if you allow them to. In my 20s, I allowed too many of them to wreak havoc on my life, and it took me to some dark places.”

14.“If a knife is falling, let it fall, and don’t try to catch it. It’s better if the knife gets damaged than if you get hurt yourself.”

15.“Strangers. Flipped off one, he tracked me down and threatened to murder me.”

16.“Not finishing antibiotics. Just because you feel better doesn’t mean you stop taking them.”

17.“As a homeowner that has had a long list of shit to do for a very, very long time, I do not mess around with plumbing or garage doors. No f’ing way. Nuh-uh. Nope.”

18.And lastly, “Hydration. Drink more water. Yes, you.”

You can read the original thread onReddit.

Note : Some responses have been edited for distance and/or pellucidity .

Hannah Witton, in a plaid top, speaks in front of bookshelves and a microphone. Yellow text reads "DOING IT!". Captioned text says "I'M NEVER DOING THAT AGAIN! NOPE. NOPE. NOPE!"

Kenan Thompson sitting and looking to the side with a slight smile, with the text "NOPE." appearing at the bottom of the image

A man in a car angrily gestures at another driver through his window

Construction workers on-site, one person in a hard hat and reflective vest directing others standing on an unfinished building structure

Neon sign in a window displaying the words "PAYDAY ADVANCE"

Four men arguing aggressively in a bar, with beer mugs and snacks on the table

A man with short hair and glasses sits on a couch, holding his stomach in discomfort while wearing a light shirt and jeans

Ocean wave crashing gently under a partly cloudy sky with the horizon in the background

A car is driving on a snowy, tree-lined road during heavy snowfall, surrounded by frosted trees and snow-covered ground

A serene swan floats peacefully on calm water in a picturesque outdoor setting

A chef garnishes a plate of steak and roasted vegetables with a sprig of rosemary

A tape measure extended to approximately 35 centimeters against a plain background

A sign on a snowy mountain showing a skier with a red prohibition symbol, indicating that skiing in the area is not allowed

A woman yawns while driving a car, covering her mouth with one hand

Hands typing on a laptop while numerous negative comments like "IDIOT!", "LOSER", "HATE U", and others appear on screen, indicating online harassment

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A man in a car and another man on foot are arguing loudly with expressive hand gestures on a street

A person holds a pill near their lips with one hand and a glass of water in the other hand, appearing to be about to take the pill

A man talking on the phone is looking at a leaking pipe under a sink, with water spilling into a metal bucket

A woman with curly hair smiles while holding a glass of water, standing in a bright room with plants in the background