The slap heard 'round the world struck Jake Paul on the left cheek Thursday night. Mike Tyson whipped his open-palmed right hand across Paul’s face at the weigh-in before their wild and weird and puzzling event.

Mike Tyson, a boxing legend, and Jake Paul, a social media legend, are ready to throw down. Financially, they'll both come out winners.

Before storming off stage, the 227-pound Paul screamed his own perspective on the matter into the microphone: "Now, it's personal."