1. Tom singing along with Kelly Clarkson's "Breakaway"
2. Tom railing against all Enemies of Tom, real or imaginary
3. "Porcupine Pie"
4. Tom challenging a caller as to the accuracy of a particular fact, insisting upon something that he knows is incorrect
More lately, it's been very amusing to hear Tom (falsely) ascribe some opinion to Mike that shows very poor taste in music/movies/etc.