From Googling about a bit it seems like all the words are
In particular, the correspondence seems to be
Why did I run around crazy for after this? What's my problem?
No idea on the Bonus but maybe somebody else will get inspiration.
As you can see above, the number $1$ is expelled in the first row. The number sequence $ (-1,1,-2,2,-3,3,-4,4,…) $ describes the relative position from the expelled number (assuming the number at the position exists). Now, number at position $-1$ for $1$ doesn't exist. So moving on to next, we get position $1$ which is 2. Obviously numbers at position $\lt 0$...