This video provides an answer to the question "Why are you hitting yourself?"
Chile U-20 player hits himself with opponent's hand [Yahoo! Sports]
Down 1-0 to Ecuador in the 76th minute of a match to decide fourth place in the Campeonato Sudamericano and the final South American qualifier for the U-20 World Cup, Chile's Bryan Carrasco...grabs [Ecuador's Edgar] Montano's wrist and slaps himself in the face with [Montano's] hand.
The match commentators couldn't hold back the shock and laughter as they realized the despicable yet goofy-looking lengths to which Carrasco sunk. But while the commentators busted a gut, the referee was tricked...and awarded Chile a free kick.The free kick did not change the outcome of the game as Ecuador still won the game 1-0. However, Carrasco should be nominated for an Academy Award with his performance.
Chile U-20 player hits himself with opponent's hand [Yahoo! Sports]