A shirtless man jumping off a large concrete structure into a river with his friends watching from the structure .
There is a very good chance that a group of friends are recording how far their shirtless friend can jump .
There is a very good chance that a group of friends are recording how far their shirtless friend can jump .
It is improbable that a group of friends are recording how far their shirtless friend can jump .
A group of friends are recording how far their shirtless friend can jump .