Koala bears. Those cute, cuddly creatures may look adorable and soft, but, from what I’ve been told, they can be vicious animals and they can make you instantly regret ever getting near them.

Who knew?!?! I sure didn’t…

People on AskReddit talked about what looks harmless but is actually really dangerous.

So you better pay attention!

1. Heads up.

“Garage door springs. People don’t realize just how much tension those things are actually under.

Never repair a garage door yourself unless you know exactly what you’re doing. The stored energy in them is enough to break bones and sever limbs.”

2. Jeez!

“Pushing someone’s face into a cake as a joke.

Some cakes have little wooden spikes inside to support the cake.

Saw a post where a girl’s face was gored by one of these.”

3. Keep your feet down.

“Putting your feet up on the dash while riding as a passenger in a moving car.

You do NOT want to see post-accident photos of what happens when someone is in that posture in a surprise head-on collision.”

4. Cat scratch fever.

“Cat bites. Cat fangs puncture deep and trap bacteria deep within your tissue, leading to horrible infections.

You might think one isn’t serious because it’s not bleeding much, but that just means the wound isn’t flushing properly – if you get seriously bitten by a cat, it’s very important to go to urgent care so they can properly disinfect the wound.”

5. Surround yourself with good people.

“Hanging around idiots.

Most of the time they only do dumbs**t that affects themselves but when they do something that affects you it can change your whole life.

So just remember if you’re in with a group of imbeciles you’re rolling the dice with your life every second, its like standing in low-grade radiation, its unnoticeable right up until it’s incurable.”

6. FYI.

“Those black foodstuffs with charcoal in them.

Charcoal interacts with a bunch of medications, gets in the way of nutrient absorption, and can really upset your digestive tract.”

7. Water dangers.

“Water in general, but fast moving water specifically.

2 or 3 inches of water is all that’s needed to sweep you off of your feet if it’s moving fast.

12 inches of water will lift and sweep away a car.

Water is heavy and will f**k you up if you don’t respect it.”

8. Changing lanes.

“Changing lanes without leaving a proper gap or checking your blind spot and signaling your intention.

On the surface it seems fine because, hey, you’re going faster than the person you’re passing right? Nope, all it takes is something like a deer to completely f**k your world sideways.

When passing anyone always wait to get into the lane they were in until you see their headlights fully in your rearview mirror and have cleared your blind spot. It’s even more dangerous to do this to a semi, your car will be eaten if it hits you.

Always, always, always visually check your blind spot. Always. Blind spot sensors are not an adequate substitute for a visual check. You’re asking for trouble if you don’t make sure someone hasn’t popped in there.

Use your dang turn signal. Other drivers are not mind readers, signal your intent and follow through with it.”

9. Just don’t do it.

“Feeding wildlife.

Even if it seems safe for yourself to do so it’s probably very dangerous for the animal you feed.

It’s very likely that feeding a wild animal may lead to it’s d**th.”

10. Didn’t know about this.

“Grapefruit juice.

By itself it’s perfectly fine, but a lot of people aren’t aware that grapefruit juice specifically has interactions with a LOT of different drugs, both medical and recreational, and can be potentially very dangerous when combined.”

11. Don’t get close.

“Taking pictures of bears ( apparently it looks harmless to people in Yellowstone ).

Bears are faster than many expect especially uphill so if you are ever near a bear and want a picture stay in your car to do it.”

12. Wrap it up.

“Unprotected s**.

There was an optional, hour-long class I took my freshman year about STIs. I took it by accident and it was simultaneously the most traumatizing and important class I’ve taken in my life.

Knowing of STIs isn’t enough, seeing pictures, learning about each one, as well as how they get transmitted, that’s important.”

13. Dangerous.

“Tylenol/acetaminophen.

This drug is fine within the recommended doses but it is ubiquitous in a lot of OTC medicines and so easy to take too much.

This is potentially damaging to the liver. Intentional overdoses are fatal.”

14. Protect your head!

“Horseback riding or biking without a helmet.

Sure helmets suck and don’t look cool, but you gotta protect those BRAINS.

And soooo many people just don’t.”

Now we want to hear from you.

In the comments, tell us what you think looks harmless but is really dangerous.

Please and thank you!