The landing lag glitch is a glitch in Brawl that causes certain characters to suffer lag under conditions that should not cause such lag. Specifically, certain special moves that place the user into helpless can have their lag "saved" if the user grabs an edge after using the move but before landing. The next time the user lands on the ground, no matter if doing it by jumping from the edge, they take the lag that would have been applied had the character landed in helpless. Of course, such lag should not happen because the character does not land in helpless, and such is the glitch - the game doesn't realize that it should forget about applying lag upon the next landing if an edge is grabbed.