SPUDOW! (PvZ)

Strategy
Simply plant a Potato Mine and wait for a zombie to walk into it. Remember, Potato Mines take 15 seconds before they arm themselves (about the time it takes to walk three tiles for most zombies). This achievement can also be unlocked by making a Zombie run into a Potato Mine in I, Zombie. (This achievement is one of the easiest to get)

Trivia

 * The achievement's name is a reference to the word shown when a Potato Mine is exploding, which is "SPUDOW!"