It may have been frustration on Pete's part, but they mentioned that he and Sean are good friends off the lanes. He might have just been giving him a hard time. After the commercial they showed a much more pleasant, and honest looking, congratulatory hand shake.
I understand the high rev high speed stuff as far as pin action goes, but the first ball in the 10th wasn't even trying to read the lane. If a guy gets a late slow messenger, or trips out a 4-9 it's one thing, but to lose to 2 really poor shots has to hurt. Everyone knows that the breaks even out over time, but I've said things like that (under my breath) when I've lost to poor performances. He looked kind of like he said it in jest, hopefully that is the case.
Telling it like it is.