 The tejo must be thrown from within the throwing area, and the goal is to impact the inside of the target at the other extreme.A chief characteristic of the sport is its use of small, exploding targets that contain gunpowder, commonly known as "mechas".These usually triangle-shaped envelopes with explosive material inside are set on the edges of the pipe where on impact with the tejo explode loudly creating a sound similar to the one created by a small revolver upon firing.