Chopper Blocks are booby-trapped blocks with either rectangular or round-shaped holes on the top. These holes have sharp hatchways which are constantly chopping the hole's hatch. When making contact with a Chopper Block, the player will be robbed of a certain amount of their Rings in addition to another negative effect, which depends on the game.
Sonic the Hedgehog CD
In Sonic the Hedgehog CD, Chopper Blocks are found in every Special Stage, appearing in rows on the terrains' roads. If Sonic passes through the Chopper Blocks, he comes to a complete stop and falls flat on his face in addition to losing Rings. The player can avoid these blocks by Spin Jumping over them.
In Knuckles' Chaotix, Chopper Blocks are found in the Bonus Stages, although they are referred to as Damage (ダメージ,Damage?) in Japanese material. Here, Chopper Blocks fly randomly around and will reduce the player's time in the Bonus Stage in addition to subtracting ten Rings from the player.