Corner flag as attacking tool

Unbelievable scene happened last Wednesday night in South America. The result is not important, players who are fighting even less, but there was one (little) detail that has made significant difference. Whether this move was creative or not, it certainly deserves harsh punishment.
Youth 20 categories from Copa Libertadores, semifinal duel between Independiente del Valle (Ecuador) and River Plate (Uruguay). Game like any other plus you can see brawl between footballers in any match. However, at the end (after the final whistle), home defender Angelo Preciado was surrounded by several Uruguayan players. He run to the corner flag, pull it out and used it as a spear to attack the guests.
This is also a short introduction of how you can have an assaulting tool hidden in a football field. Do not try to pull this of, as consequences may be severe afterwards, like here...