system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do eggshells seemingly "dodge" your finger when you try to pick them out of a cracked egg?
gpt
Egg is a viscous fluid, and when it moves, anything trapped inside it moves also. Your finger "pushes" the egg away from itself when you go to fish out the eggshell - however, the egg pushes the eggshell away from your finger because it is viscous. Think of how jello would behave if you pushed on it, egg is like a more watery jello.

If you use another eggshell piece to fish it out, you will have more success, the sharp edge of the other eggshell will "cut" through the egg and let you grab the other piece.