Irresistible Force vs. Immovable Object

While perusing the intertubes today, I noticed an advertisement: “Beat Any Martial Arts Master” it claimed.
The advertised site then proclaimed that one could, after an exchange of money, become so skilled at this particular martial art that one could defeat anyone in close combat.
Now, what happens if someone who has completed this program were to get involved in a fight with someone else who has completed the program? I suspect some sort of world-shattering kaboom would ensue.