Gravity. It's the law.

mikerickson:

He comes to the window and says, “do you have any idea how fast you were going?” Heisenberg replied, “no but I can tell you exactly where I was.”

Hearing this strange reply the cop decides to conduct a search of the car. After opening the trunk of the car he immediately returns to the front window where he startlingly asks, “did you know there’s a dead cat in your trunk?!”

Schrodinger then looks at him and says, “well thanks, now I do.”