We were leading climbing in the gym (group of 3), I was going up an easier warm up route as the first climb of the day. When I reached the top I clipped the anchors and let go (something I do regularly when climbing with another partner who was not present). At the moment I let go the belayer was distracted by the 3rd member of the party pointing out a route we could do next, resulting in the belayer looking away from me, the climber.

I fell the majority of the height of the wall before the belayer realised what was going on and grabbed the dead end just in time to prevent a ground fall.

We were very lucky there were no injuries.