For one specific example, when they brought up the Xfinity fast lap of the race coming up TJ muttered "gee, wonder who that'll be." When Brett did the read later and said it was Chase, TJ deadpanned in the background "on 40 laps tires in traffic, but whatever."
The Dale Jr shot was during a segment where they were talking about crappy spotters and how hard some drivers could be. Brett talked about how Michael Waltrip would wear your butt out on the radio, and TJ responded that spotting for Dale Jr during the COT days was the worst because of how much he whined and fussed at the spotter.
They teed one up for TJ with a "what was the maddest you'd been about being wrecked" bit, but he simply said "let me think about it" and never answered.