look at the return in the inner loop. I think the logic is what he intended. I theorize that his data looks like:

username row
num questions row
username row
num questions row
username row 
num questions row
...

and that he is calling the function multiple times to get all his users (although I have no idea how he knows when to stop). he probably (shutter) has a loop around the function that tests $index < @records.