You can test the command on some terrain objects. For example, on Stratis:
1. Use this code to teleport the player to the desired location:
```
player setPosASL [2253.21,5686.22,6.02753]
```
Or alternatively, move to grid 022056.
2. Look at the "tunnel" object seen below:
{F1703775}
3. Execute this command:
```
vectorUp cursorObject
```
4. You'll see that the result is:
```
[0,0,2.31199]
```
which is not a unit vector.
It should be:
```
[0,0,1]
```