Hm...thanks for the insight, guys. I was going to keep the robot silent in the last panel, but I decided he needed to say something...because I'm a fool, you see. Heh.
The nail in the head made sense to me at the time, but it was about five in the morning with no sleep for the past few days, so I can see how it was lost. I'm all rested up now...you're right, it doesn't make as much sense.