The cooler on the yacht containing the evidence has the name H.MADDAS stenciled on it. When you see it reflected in the mirror, it reads SADDAM.H.
David Cross had publicly mocked James Lipton (Warden Gentles) as part of his stand-up act, referring to Lipton as "pretentious" and "the most pompous, arrogant failure in history." Lipton was not amused by Cross' impersonations of himself, but during filming, they ended up becoming friends (although Cross maintained his criticism of Lipton's show, Inside the Actors Studio (1994)).
When Warden Gentiles (James Lipton) looks for an empty cell for Tobias (David Cross), he mentions cell 187 won't be open until midnight, insinuating an execution to take place on that date. In California, 1-8-7 is the numeric code used by law enforcement officials for murder.
The bus reads "Church of the Good Shepherd", a joke on the fact that Michael (Jason Bateman) said the employees are like sheep.
The subtitle "hello" can be seen in a small text next to Annyong (Justin Lee)'s head when Michael (Jason Bateman) approaches the banana stand looking for George Michael (Michael Cera).