When Dwight meets his brother Joe for the first time in many years, Joe chest seems to expand while in the casket.
In the opening scene when Dwight is dressing, the close-up as he adjusts his cufflink reveals that his shirt cuff is monogrammed with "SS" (Sylvester Stallone).
When Dwight stands next to Pete's coffin you can see Pete slightly breath as his folded hands slowly move up and down.