A kryptonite pin can be defined as: Any pin in Pro Wrestling/Sports Entertainment wherein the participant who has clearly been the recipient of most of the offensive maneuvers, pins his opponent and renders the previously unstoppable aggressor completely helpless and unable to escape the position.
These pins tend to occur in two varieties. The first being a very short match, where the losing individual effectively executes one counter or offensive move then suddenly lands a pin.
Example of the first variety: One of Tensai's first losses after his return to WWE was via kryptonite pin to Tyson Kidd, seen here.
The kryptonite pin can be seen in the early matches of a non PPV wrestling show. These matches are commonly between mid card baby faces and heels and more often than not end in the face getting one over on the heel. Frequently this type of pin used not to put the face over, but to build heat for the heel by eliciting a violent reaction or outburst upon an unsuspecting innocent by standard as shown in the example above.
The second variety of kryptonite pins can be regularly attributed to the Supermen of wrestling such as Hulk Hogan. These pins occur after a longer grueling match and are result of a patented and predictable set of moves (sometimes of doom) that negate any and all previous offense by their foe, regardless of volume, effectiveness, or severity and end in the same debilitating fashion.