Abed tells Annie to "try track 127" on the jukebox, which she does. The display at the top then shows that selection 130 is playing.
After taking the bag of money, Carl says, "Take it up with Subway, after close of escrow." Escrow is a holding account for money, usually managed by a law firm or bank, not an event that takes place. This is a common mistake in sitcoms.
The "CB radio" the Dean found, which had supposedly been sealed in the computer department since the 1970s, is actually a Motorola XTL5000 digital mobile radio which was introduced in the early 2000s and is not capable of working on U.S. CB frequencies.
Dean Pelton starts gagging audibly before the toy rocket entered his mouth.