Tunnel of Lava!

Tunnel of Lava! is a single-player Bowser minigame found in Mario Party 7. Its name is a pun on the carnival ride "Tunnel of Love".

Introduction
A Mecha-Koopa eats a key, then runs off into a door. Then, a large group of Mecha-Koopas emerges from that area.

Gameplay
The player must jump on Mecha-Koopas until they jump on the Mecha-Koopa that swallowed the Key. However, the Mecha-Koopas constantly rotate in a circle and move in and out. Occasionally, their eyes will glow, and they breathe fire. Touching the flame or Mecha-Koopa will stun the player temporarily. If the player successfully finds the correct Mecha-Koopa within 30 seconds, they avoid Bowser's penalty.

Trivia

 * The name of this game describes the location as opposed to the gameplay, despite the fact that all of the single-player Bowser minigames were in the same location.