Sentinel's expression remains stony. Hooded, even. He doesn't hesitate to reach out and whack Impactor upside the head to try and shut him up.

"Yes." He says, through gritted teeth. "You clearly have a highly incorrect understanding of the situation we've all been forced into and the sacrifices we've had to make."

The sacrifices I've had to make, more like. Though, to be fair, Sentinel really truly did not mind helping out. It did save his life, after all.