These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
"Funny Aneurysm" Moment: One episode had Double Trouble stealing the World Trade Center. Fast forward a decade later...
In the second round of the episode "White Out", a contestant picks Baldy Mountain and Rockapella says, "Greg's been there!" Greg then jokes that this will be Rockapella's last year on the show. In fact, this was from the last season before World changed to Time, so it really was Rockapella's last year on the show.
Genius Bonus: Rockapella's flourishes during the second round often got rather creative in order to stay on the standard rhythm. An episode featuring a looted railway used "finagled funicular!" and one about kidnapped whales included "sedated cetaceans!"