Bomb Prank!

A person in a dark outfit walks along a sidewalk beside a building, approaches a person in a white robe crouched near a trash bin, and then runs away as the person in white suddenly lunges forward; the person in dark clothing continues running, vaults over a low metal railing, and continues running along the side of the building. The scene takes place outside a building with a sign reading "ANYTIME FITNESS" under an overcast sky.