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".

Gameplay
In a group of Mecha-Koopas, one of them swallowed a key. The player attempts to find the Mecha-Koopa with the key by jumping on them. The Mecha-Koopas breathe fire if their eyes glow red. If the fire catches the player, the player is stunned at the moment. As time passes by, they start running away when their eyes glow red; the player should be quick and hurry up because there's only thirty seconds on the game clock. If the player gets the key before the thirty seconds are up, the player wins.

Trivia

 * The name is more about the location instead of the thing just happened, while other 1-Player Bowser Minigames appearing in Mario Party 7 are located in the same location, but their names are about the thing that (would be) happened.