Matthew Briody did in fact urinate on the floor.
The high five between Rob and Matty playing god in the initial confessions is overdubbed.
Rob holding the Guitar Hero box is a parody of Ricky Gervais doing the same thing in an unexplained image that surfaced online in 2016.
When driving the RV and playing the guitar simultaneously, Ryan plays the original ADITL theme.
The intro sequence is inspired by the Cars intro.