Reverse Pyramid Chinups

This is a picture of one of my home gyms.

Last time I tried the reverse pyramid for pulling I made it to 9.  Today I tried it for chin-ups (palms toward your face) and made it to 13.  Fast reps, all the way up, all the way down.  I was pretty darn happy about this.

It looks like this:

Set                          Reps
----                         -----
1.                              1
2.                             1 1
3.                           1 1 1
4.                          1 1 1 1
5.                         1 1 1 1 1
6.                        1 1 1 1 1 1
7.                       1 1 1 1 1 1 1
8.                      1 1 1 1 1 1 1 1
9.                     1 1 1 1 1 1 1 1 1
10.                  1 1 1 1 1 1 1 1 1 1
11.                 1 1 1 1 1 1 1 1 1 1 1
12.                1 1 1 1 1 1 1 1 1 1 1 1
13.               1 1 1 1 1 1 1 1 1 1 1 1 1