The actor playing "Uncle Clarance" and the actress playing "Kayla" are brother and sister in real life.
Throughout the filming the cast would make contributions to the film eg. the scene in which Agent #2 (Yael Martinez) notices Damon's pizza has been left behind and he subsequently takes it with him was suggested by Gene Gabriel (Harrison).
Due to scheduling conflicts actor Tom Shay (Agent #1) was not available for the scene in which Damon (Ron Rogell) is being chased by the Agent's SUV so Gene Gabriel is driving the SUV dressed as Agent #1 in the sequence.
Throughout the film the character's clothing alters slightly as well as their hair cuts etc. This is to show that altering anything in the course of time can cause even the smallest changes.