"X" Bumper

The Danger Panel (デンジャーパネル), also referred to as "X" Bumper are minor gimmicks that appear in Knuckles' Chaotix. Found in Special Stage, they can bounce the player backwards in order to avoid drop-offs.

Description
Danger Panels are flat, round signs with red edges and black "X" mark on the yellow background. They are only featured in Special Stages, where they are place on edges of the Special Stage course.

As the player moves with continuous speed ahead and cannot stop at one place, Danger Panels can provide quick help from getting fall off the course by running towards it. This causes the playable character be bounced backwards for a small distance. However, the Danger Panel disappears after hitting it once, as the player can then try turn away from the edge.