Tunnel of Lava!

Tunnel of Lava! is a single-player Bowser mini-game found in ''Mario Party 7.

Gameplay
A group of Mecha-Koopas appear as one of them swallowed the Key. The player attempts to find the Mecha-Koopa with the key by jumping on them. One of the Mecha-Koopa will breathe fire if one of their eyes glows red. If the fire catches the player, the player is stunned at the moment. As time passes by, they start getting away when their eyes glow red; be quick and hurry up. If the player gets the key, the player wins.

Trivia

 * This mini-game's name is a pun on the carnival ride "Tunnel of Love".