What is this exercise called?

Hi everyone! Back when I did Gymnastics there was this weird thing me and my friends would try to do (and fail miserably at). I don't remember if it had a name or if it was a legitimate exercise, but here's how it went

Your shins are touching the ground and the rest of your body is upright. Someone is holding down your legs or sitting on your calves so they don't move, and then you lower the rest of your body forward as one piece (knee is the fulcrum) and then come back up. The goal was to get all the way to the ground (I could never even make it to 45 degrees haha)