Thwomper Room is a Free-for-All minigame featured in Mario Party 9.
Introduction
The camera does a close up of the two central Thwomps. Their eyes open and they slam into the floor. The camera spreads out to show the whole room.
Gameplay
Players try to survive among the falling Thwomps. Getting hit results in immediate elimination. A Thwomp's eyes will open just before it crashes to the floor, providing warning for the players. Players can also jump and can slow down a player by jumping on their head. The last player remaining, or any players remaining after 30 seconds, win.
During a reverse minigame, one of the players has to be the first to get hit by a Thwomp.