Is It Possible To Fall Through A Closed Window

Can you really jump out of a glass window in real life just like in the movies?

Oh my gosh no. Depending on which region you live, commercial windows are either heat strengthened tempered or laminated glass. Heat strengthened is pretty frigging strong and unless you break the window first, heaving your body at the glass is going to feel like heaving your body against a smooth concrete wall.Should you muster up enough force and jump through the glass correctly, you’re can break it, but it will hurt quite a bit.Laminated glass is even worse. Should you happen to jump through laminated glass, you’ll be very nicely cut up. This is because laminated glass has an interlayer which acts as extra security. The glass can shatter, but it will act to hold the glass together. This means that you not only have to shatter the glass, but you also have to create a hole in the glass.Residential glass in a lower end to average house is your best bet. Here we typically have a thinner glass that will break more easily. It’s often annealed or plate glass. What’s the difference? Well I can lightly throw a rock and shatter and break annealed or plate glass. I can throw a rock with all my might and depending on the sharpness of the rock, cause a small spiderweb-like shattering affect.But again, this is really only for lower end home. Higher end homes tend to have thicker and hurricane rated glass. Hurricane rated glass is laminated glass.One last thing to tough base on, insulated glass. If you’re in a high rise, there’s a good chance the glass being used either has a monstrously thick interlayer and/or it is laminated-insulated. This means you have an extra piece of glass to break through.In short, it’s not at all like you see in the movies. Generally when the action hero jumps through glass, it’s break away glass; not even plate glass. Break away glass is extremely brittle and breaks into super small pieces ad to minimize lacerations on the skin.Regarding Holden Day Wilson’s fall through a window from 20+ stories up. This was primarily due to the frame failing.All that being said, if you’re ever in a situation where you need to get through a commercial glass window, instead of hurling your body, use a heavy object with pointed edge to break the glass. Next clean the newly made hole as best as you can, then hurl your body through the hole. A knife will glass-break will work, a trophy is likely not heavy enough, and a chair may not have a sharp enough corner. Breaking glass is not at all as easy as it’s made to appear in movies.

Is it healthy to sleep with an open window in winter?

It depends on context.To reduce the risk of cross infection from colds and flu, opening a window in your workplace will help exchange rather than re-cycle your air. If there is someone in your bedroom, you are either probably already intimate with them (a hug or kiss, so likely to cross infect by touch anyway) or they are about to murder you. Little real benefit opening the window. No net benefit.Letting condensation out may reduce black mold growth, so opening the window is good for you. Lowering the temperature should allow you to more quickly get to sleep and stay asleep (read it recently, reducing core body temp, sorry no reference). Possible increased health through more sleep.Opening the window and letting heat out wastes energy you have paid for. The money you used to generate this heat could have been used on medical treatments or better quality food. So reduced health by opening the window.Losing generated heat also means you are unnecessarily burning fuel, increasing pollution and greenhouse gasses. Generally seen as bad for your health.Opening the window and letting mosquitos and other diease carrying insects in to feed upon you is bad for your health.So on balance, probably bad, but I still do it.No one mentioned the risk of Dracula.

Why isn't it possible to jump off an object before hitting the ground when falling to avoid injury? For example: Building is on fire. You jump from window with a chair. Waiting until the chair is about to hit, you jump from the chair safely.

This will work if two conditions are satisfied: 1. The chair you are riding is much more massive than you, and 2. You are capable of jumping from the ground up to the window from which you are leaping.First, as others have pointed out, if you push off from an object in free fall both objects move away from each other.  The objects will have equal and opposite change in momentum.  If the objects have equal mass, they will move away from each other with equal velocity.  If one object is much less massive than the other, that object will have a much greater change in velocity than the massive object.  Since your goal here is to get as much of a change in velocity as possible, you want to be the less massive object.  So find a really heavy chair.  Or maybe a grand piano or something.  Let's assume that the chair (or piano) is way way more massive than you, so that all of the energy of the jump goes into pushing you up, and not the object down.Second, you will need to reduce your velocity relative to the ground to just about zero to land comfortably.  That is, you need to impart to yourself an upwards velocity equal and opposite to the downwards velocity built up over the course of your fall. If you think about this in reverse, that is the same upwards velocity you would have needed to jump from the ground up to the window (let's neglect air resistance here, though it would come into play for tall buildings).  Most people do not have the necessary leg strength to jump from the ground to any window higher than the ground floor.  If you did, you could also just use your prodigious leg strength to absorb the energy of your fall, and do away with the whole chair/grand piano jumping scheme.