@JonCuster Is that suggestion different from the accepted answer?

Going even deeper than atomic scale, it is thought that there is a shortest distance at which it is possible to determine the position of an object - the Planck length. So no structure could be discernable/provable below that size (if correct).

And if your other hand is free, use it to support the bottom of the bag at the same time.

The horizon is only about 5 kilometers away.

@JohnDoty Are you saying quarks are mathematical abstractions?

lol, the behavior and appearance of an object reentering the atmosphere isn't mainstream physics??

@DKNguyen Possibly, but you would have to hit harder than by just falling, if the Mythbusters test is indicative. They dropped pigs out of a helicopter and they sustained much more damage landing on concrete than water.

@CaiusJard In the most common form of red-green color blindness (which is the most common form of color blindness), and some other types that work the same way, the frequencies are all registered but differently. The red and green cones overlap more in the frequencies of light they're sensitive to, which leads to a diminished ability to distinguish those colors. There are forms of color blindness that are caused by missing cones, but they're much more rare. en.wikipedia.org/wiki/…

Sorry wasn't expecting a joke.

@JeremyFriesner If the fan blades are spinning relative to the rest of the fan, then there must be another boundary internal to the fan.

@JeremyFriesner Well something is rotating relative to something. I don't know exactly where the boundary is but whether it's between the blades and the motor, or the motor and the housing, there is going to be friction that causes energy to be lost. Though as pointed out elsewhere most of the energy would be transferred to the fan to spin it in the opposite direction until the blades aren't spinning relative to the fan any more.

@JeremyFriesner No, there will still be internal friction. There's a comment on the accepted answer that goes into more detail about what would happen.

@Floris This is the closest I could find, which falls dismally short of an elevator jam packed with ballerinas: i.pinimg.com/originals/8c/e5/9f/…