In your favourite video game featuring melee weapons (mainly swords), run up to a wall and press the attack button. If the sword clips through the wall, this trope is not in effect. If the character staggers and the weapon bounces back, then it is.
Compare wall-striking in the Kingdom Hearts series and in Demon's Souls
to striking them in Dead Rising, or Dark Cloud. Needs a better name. [Boomerang Barricade doesn't really seem to be a good name; it doesn't really describe the trope.]
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