a Nub-Obstacle. A common task that a person considers to be a major obstacle challenge to them, but others can perform said task without having to think about how do it. The Nub consistently required assistance with these tasks that are considered to be basic and he is threfore stuck on a Nubstacle.
A person is trying to fill their car up with gas and is having trouble getting the gas door open. They have been prying at the gas door with no success. This is a Nubstacle for them. The person on the other side of the gas pump comes over and shows them the gas door release lever inside of the car. they appreciate the help but them realize what a fool they have made of theirself.