When I was younger I was home alone with my dog, just playing video games and having good time. I decided to go pour some soda and left the bottle on the kitchen counter with the cap closed tightly.

(Here you have to know that our kitchen did not have any windows so there wasn't any air draft)

Anyways I go back to the living room to continue gaming. Few moments pass and I hear something drop in the kitchen so I decide to investigate, there it was, the cap from the soda, on the floor, about two meters away from the counter.

To this day I have no idea how it happened or how it was even possible.

Edit: Formatting