This summarizes it well. Two more (in fact, the most frequent ones I saw) are: (1) He moves a piece, accidentally another piece tumbles down on the board, he

This summarizes it well. Two more (in fact, the most frequent ones I saw) are: (1) He moves a piece, accidentally another piece tumbles down on the board, he adjusts it, and meanwhile, one of the opponent's crucial pawns magically disappear. (2) Same as above, with opponent's pawn (or his pawn) magically moving to a better location for him.