Most deaths in house fires are caused by smoke inhalation, not burns
Stay low to the ground to avoid breathing in too much smoke, says Harsh Sharma.
If you get hurt in a public place, single out one person for help to avoid the bystander effect
Sharma also notes the well-studied psychological phenomenon in which crowds of people fail to help somebody because they all think someone else will intervene.
If you're not too hurt to call out for help, pick one person and direct your pleas to them. You'll be more likely to get the aid you need.
A bright flashlight could be your greatest weapon against an attacker
Instead of using mace or a weapon, an extremely bright flashlight can also effectively ward off a mugger, user Sanket Shah claims.
"If you have someone approaching you that seems aggressive, in the gravest extreme, a blast of300+ lumen to the eyes (especially at night) will give you the opportunity to get out," he says. "And suppose you miss-read the situation; no one is really harmed and you can't get in trouble for it."
If you get lost on a hike, try to find a fence or stream
"The stream always flows downhill and invariably will reach a larger tributary or a body of water," says user Jon Mixon.
Meanwhile, the fence will almost always lead to a road or a structure.
Use condoms as makeshift water storage
Condoms are incredibly elastic. As user Janis Butevics points out, you can use that to your advantage if you need a quick way to store large volumes of water. They essentially act like bladders and are capable of holding a gallon of water.
"They can also be used to protect against water, as a stretchable cover for valuable items like matches and walkie-talkies," Butevics says.
Picking out exits ahead of time will cut through your "normalcy bias"
When local governments send out warnings about natural disasters, many people stay put even when told to evacuate. As John Ewing explains, psychologists call the phenomenon the "normalcy bias." It refers to people's tendency to think everything will turn out OK even when they're clearly in danger.
Ewing says people can break out of their normalcy bias cycle by locating multiple exits when they're out in public, such as at the movies or in a restaurant. Mentally preparing for a dangerous situation will train you to be vigilant.
Downed power lines are lethal
As Cal DeBouvre explains, the voltage in a downed power line is high enough to push electricity through the dirt nearby. "If you spot a downed power line walk the other way and call the police immediately," he says.
If a line falls near you, keep your feet together and jump or shuffle away. If you take normal steps, you're at risk of conducting electricity in your body since the current can flow through both legs separately.
Read next on Business Insider: A leading procrastination expert reveals which personality types tend to put stuff off