Step-by-step tutorial
Step 1
Use the pushpin to poke holes around the bottom of the bottle.
Step 2
Pour water into the bottle. To get some good leaks, you’ll want to fill it most of the way.
Step 3
Now… drop it!
Step 4
This is a little hard to see, so we recommend working with a friend to film the drop in slow motion.
Learn more
In the slo-mo, you’ll see that as long as the bottle is falling, the leak stops. That’s because gravity pulls everything down at the same rate, called the acceleration of gravity. While the bottle is falling, the water can’t leak because, if it did, it would be falling faster than the bottle is.