Jumping eye
Jumping eyes are some kind of static enemy, which do not move or attack and just stay in one place, jumping endlessly, sounding like a bounding ball. They can hurt Rayman if he gets too close to them. They can be destroyed in one hit.
They appear in Rayman 2: The Great Escape. They are met only two times, in front of the entrance to the Cave of Bad Dreams and in the first part of the Sanctuary of Rock and Lava (the location where we meet Chenille in the PS2 version). They also appear on the big root before reaching entrance to the Sanctuary of Rock and Lava.