Very good, humorous, great voice over.
I really loved the voice over, it was great.
Another thing I admired, was the movement of the character, I loved his expressions and the way he moved around right up close to the camera behind the mail, etc. The animation wasn't smooth, but I think it was intended to be that way.
The timing of his expressions was priceless as well.
I loved the way the backgrounds were drawn too, your line work from thick to thin was sparatic and I thought that was great.
The underlining background music, drum beat would have been nice if it was just a tad louder, because it was a nice choice to set the mood, but was almost unnoticeable.
Great work! You have obviously been doing this a long time, and look to your work to learn many things.