Pressure in the Air
What You Did
You forced a hard-boiled egg into a container without touching it.
Intended Results
Your peeled, hard-boiled egg should have been pulled into the jar after a second or two while the index card burned.
Unintended Results
You may have tried this without both boiling and peeling your egg first
Keep Tinkering
This is an exact experiment, but you can do it as many times as you have boiled eggs to spare. Try this in the springtime, around the equinox or Easter, as you may have many hard-boiled eggs left over from your celebrations.
Explored Concepts
air pressure