Idiom Scenario 1:
Victor and Bruce, two teenage friends, are standing at the bottom of a ten flight set of stairs ...
Victor: "I bet I can beat you to the top!"
Bruce: "No way! I am way faster than you."
Victor: "Put your money where your mouth is
Bruce: "OK. I will bet you five dollars that I can beat you to the top."
Victor: "You're on. Let's race!"