In the background while Michael (Jason Bateman) and Oscar (Jeffrey Tambor) are talking, a sign that says "Parking in Rear" can be seen. Given how Michael interpreted "put it in her brownie", the double-entendre to this sign is clear.
The text on the change machine indicates it can return one or two $10 rolls of quarters. Buster (Tony Hale) puts in a $100 bill and loses $90.
This is the first use of Gob (Will Arnett)'s line "They're laughing with me," later heard in episode 2.17, Spring Breakout (2005).