“The guy from the facility came RUNNING after me screaming ‘Open your windows!’.

He may have saved my life.”

Here are some of the most-upvoted answers:

1.

Cracked windshield with focus on impact point, a truck is visible on the road in the background

“Brake-checking a semi(youd think itd be obvious but nope).”

People have died playing withdry ice."

“Slipping in theshower.”

Dense smoke or fog swirling against a dark background, partially obscuring whatever lies behind it

“Inhalantsor aerosol abuse.

I tried them once in high school.

Two weeks later a kid at another school died from using them THE FIRST TIME.”

Water falling from a square showerhead in a modern bathroom, with a rack of bottles and a plant in the background

Don’t assume it’s the air you’re used to down there."

6.“Water.

People often do not respectwaterand how it can quickly kill you.”

A whipped cream dispenser tip with a flower-shaped nozzle and its cap removed, placed on a flat surface

“Fallingfrom regular standingheight.”

“Things under huge amounts of tension.

9.“Capacitors.

View from the bottom of a deep vertical cavern looking up towards a square opening with a small tree and vines hanging down

Shocking, I know.”

10.“Horses.

“Texting while driving.”

Sunlight reflects on the rippling surface of a body of water

They’ve evolved defences to make large predators rethink their life choices.

They will mess you up.”

“Hey, thatsmall invertebrateyou found by the sea?

Person mid-air after falling off a scooter at a skate park. A helmet is on the ground. Trees and people in the background

like leave it alone.”

“A fistfight.One wrong punchand youre in prison for killing a dude.”

“Electricity,particularly involving overhead wires.”

Person wearing gloves installs a motorcycle shock absorber beside a tool set and rear wheel

“One simple wrong move on the highway.”

Well, minutes, but still… it’s odourless and colourless.

Most likely, you won’t even know*.”

A close-up view of a computer processor's pin grid array, showing detailed pins and contact points on the chip surface

“Mixing bleach and vinegar.”

19.“Rust.

So you don’t know you are going until you are dead.”

A woman leans her forehead against a white horse, affectionately holding the bridle. Another horse stands in the background

“Post-partum haemorrhage.”

“Inhaling too much helium.”

Though rare, it can end your life or cause paraplegia, quadriplegia, or vertebral dissections."

A person driving while holding a phone in one hand, their other hand on the steering wheel. Focus on the phone use while driving

Shout out tor/AskRedditandu/gary1405for having this discussion.

Note: Submissions have been edited for length and/or clarity.

Close-up image of a brown cow's face, focusing on its eye and ear, with part of another cow blurred in the background

Portuguese man o' war on pebbles, showing its translucent and iridescent float

A close-up of a person's clenched fist against a plain background

Aerial view of electrical power lines running through a dense forest

Heavy traffic with numerous vehicles on a multi-lane road, brake lights illuminated, suggesting a slow-moving or congested situation. No people visible

A close-up view of a gas stove burner with a blue flame

Person pouring liquid from a yellow bottle into a green container with a grate

Rusty, interlocking metal chains in a close-up view

A close-up shot of a person lying down, wearing a hospital gown, with their hands resting on their pregnant belly

A bundle of star-shaped balloons floats against a clear blue sky

A person in a navy medical uniform performs a neck adjustment on a man lying shirtless on a treatment table