Flat stone

Flat stones are items from Rayman, found in the Blue Mountains and the Caves of Skops. There are only two of them in the original game: the first one in Mr Stone's Peaks, which is pulled down by two massive rocks tied with rope that Rayman must cut with his helicopter, and the second one in Crystal Palace, which simply goes down the chasm and eventually falls in water.

A flat stone in the Caves of Skops

Rayman must use his helicopter hair to cut these ropes