The feature would be just like SM64, if your about to reach to other side of where your gonna jump, but if you miss, without this feature, you would just bump onto the other side and fall down a pit of doom. The limit for the feature to work is a brick atleast 20 studs high, and can only be held onto from the top.
Scenario:
You jump from one side to another, your about to fall down, but then you grab onto the ledge and hang onto it. |