Flip Panel (Chain-Link)

Flip Panels are a type of fence-based object appearing in the New Super Mario Bros. sub-series.

New Super Mario Bros.
Flip Panels first appear in New Super Mario Bros. They are objects attached to fences that, when hit, rotate the player, Amps, and Climbing Koopas onto the other side of the fence. They also come in two different sizes; while the small ones have dimensions 2×2 and take roughly a third of a second to flip over, the large ones have dimensions 12×4 and take roughly three-quarters of a second to flip over. While two large ones appear in along with a small one in the area with the level's third Star Coin, numerous small ones appear throughout.

New Super Mario Bros. Wii
Flip Panels return in New Super Mario Bros. Wii, behaving the same as in New Super Mario Bros., though the small ones now have dimensions 4×4. Only three appear in the entire game, all of which are found in : a small one appears near the beginning of the level, a large one subsequently appears just after the level's first Star Coin, and another small one appears just before the Warp Door leading to the midway point.

Notably, a particular glitch involving the large Flip Panel exists in this game; if the player uses an Ice Ball to freeze a Climbing Koopa, then flip the Flip Panel while the Climbing Koopa intersects it, the Climbing Koopa will fall to the ground and produce infinite coins.