If you’ve been around kids, you know that they don’t really understand the dangers of the “real” world very well. You try to school them about it, but they don’t really listen to you; it seems that no amount of “don’t touch that!” will work on them.
So they go on to touch something hot or prickly while you turn your back for a second and despite the tears afterwards, they learn a valuable lesson. These netizens have had similar realizations – sometimes in life-threatening situations – that they should not mess with some things.
More info: Reddit
#21

Cat bites.
I love cats, but got bit by one once. Spent 3 days in the hospital and there were talks of amputating 2 of my fingers and maybe 1/2 of another finger. Had intense IV antibiotics and came out fine but was scary for a couple days
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98points
#22

Fridays. In the IT world we call it "read-only friday". Don't change anything!!
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86points
#24

Heights. I fell out of a tree when I was a kid and nearly severed my leg. A branch ripped it wide open and to the bone, I had fat and muscle falling out, and I very nearly bled to death. It took hours of surgery and months spent mostly in bed before I was able to really use that leg again. It's been more than twenty-five years since then and the scar is still massive (half an inch wide and wraps all the way around my inner thigh). That fall was only three feet. #1 reason for why I frequently tell people to never underestimate a fall, even a short one. It only takes one accident to completely f**k you up and potentially [end] you, so caution is important.
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85points
#25

My health. Getting older you rediscover all those old hurts. When I was 20 I hyperextended both elbows playing volleyball. 15 years later my elbows started aching in the winter :(
Also my teeth. It falls under health, but not everyone thinks about the dentist when they think about health. If you are reading this please floss. Its a small thing that can make a huge difference later. Trust me
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84points
#26

Bed bugs. You cant treat those mother F*****s by yourself. You need a professional to treat that s**t.
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84points
#27

Waves.
Newby body surfer, misjudged a six foot wave and nearly drowned.
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80points
#28

Boulders covered with algae in mountain creeks do not equal water slides.
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80points
#29

Precipitation when it is cold outside.
I got caught in a snowstorm in Shenandoah National Park in March, 2019. It was 50 in the valley, but I got 2 feet of snow on the top of the ridge. The forecast did not call for any precipitation that day. I was hiking on the Appalachian Trail and thought that a few flurries were nothing to worry about. I left a lean-to shelter that would have kept me dry and protected from the wind. I hiked less than 6 miles and was struggling to move forward because the snow was so deep. I was soaked to the bone, freezing cold, and beginning to lose fine muscle control in my fingers. The trail followed the side of a ridge and was not providing me any flat spaces to set up a tent. I eventually found a clearing where some power lines crossed the trail and struggled to get my tent erected despite the loss of feeling in my fingers. Once my tent was set up, I got my sleeping pad and sleeping bag deployed, got out of my wet clothes and crawled into the bag for an hour to warm up.
I didn't even have a cell signal where I could let someone know my exact location and that I was ok. I had been in contact the previous evening, so my girlfriend knew my location to within a couple of miles.
The snowstorm lasted all night and I had to spend a full 24 hours in the tent before the snow stopped. The next day after the snow stopped, I packed up my camp and kept hiking through the 2 feet of snow. The trail crossed Skyline Drive after a short distance and I followed that road for ~9 miles to the nearest park entrance. I called a shuttle and spent the night in Waynesboro, VA at a hiker hostel. The warm shower, boot dryer, and warm food were exquisite.
When you make an error in judgement in the wilderness, the goal is to survive long enough to learn from your mistake. I learned my lesson. I will not screw around when dealing with precipitation and cold weather. If there is any doubt, I will just hunker down and wait for the wet weather to pass.
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76points
#33

Never never trust a trench or a hole over your shoulders deep. You will die a horrible death. Yes at the beach too.
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67points
#37

The HR frequent flyer. It doesn't matter if you didn't do anything wrong, they will still make your work life unbearably annoying if you dare upset them.
44points
#38
A commercial dishwasher that has tape over the power button. I time travelled to the other side of the room.
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43points
#39
You ever slide down a staircase on a pillow or a mattress?
10 y/o me thought going down headfirst inside a sleeping bag was a great way to up the rush.
Turns out, going into shock is not fun.
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40points







