Gnosty and Friends of The Light, The Truth,
I have been reminded of a stonewalling affect used. This method is by causing trees to diagonally fall across paths or roadways therefore stalling progress. A roadway aligned with trees on both sides is charged and primed with ex-plosives on the base of each tree using a in-line series detonation while at the same time there are "kicker charges" placed about two-thirds up on each tree in order to cause a directional "push" to the direction desired. These "kicker charges" are much less potent than what the actual rate of detonation and its affects are on the base of the trees. When the charges are detonated, the ex-plossion causes the desired affect. I believe the method is called an "abbatis," in military terms. A sort of DOUBLE CROSS is then in place.
Now... while they figure out the formula of amount of explosive charges to wrap around the base of the trees, the "kicker charges" two thirds up on the trees, are simple and do not require much "brains."
Peace, and patience,