The Boomerang Effect

Don't understand the Boomerang Effect? Here's a brief trial to show you what's going on. The effect stems from the fact that the rate is always adding 1 to itself. You can see this visually as well in the GUI version.

The RateThe Visible NumberThe User's KeypressExplanations
0 0 None Beginning
1 1 None  
2 3 None  
3 6 None  
4 10 None  
5 15 None  
6 21 None  
7 28 None  
8 36 None  
9 45 None  
10 55 None  
-10 66 '\' Rate Reverses
-9 57 None  
-8 49 None  
-7 42 None  
-6 36 None  
-5 31 None  
-4 27 None  
-3 24 None  
-2 22 None  
-1 21 None  
0 21 None  
1 22 None Voila! The
2 24 None boomerang
3 27 None effect!