What is Garth DeFelice saying to Jim Harbaugh?

Earlier today, we said this officiating crew had some serious question marks in their recent history. Well, this crew is off to a rather inauspicious start. We saw time run off the clock on an incomplete pass, and we've seen some missed pass interference calls. It happens in every game, but when we're dealing with a ref like Clete Blakeman who has a dubious history, complaints tend to be greater.

At one point, Jim Harbaugh was trying to get an explanation from umpire Garth DeFelice. It resulted in this GIF. Any thoughts on what DeFelice is saying to Harbaugh?