Dropping forwards only works particularly well if you catch someone not particularly professional off guard.

It -was- working, but Fury recovered by jumping into Unbridled Fury before it could work properly, and in my most recent post Fury pulled back instead, instigating the final stages of the choke (and also forcing your hands out, leaving maybe enough room for fingers.)

I know this is possible, because my friend tried the choke on me and I escaped easily by dropping forward, when I did it to him I maintained the choke (because I'm significantly stronger.)