in the dream It was a secret ending to postal 1 where p1 dude and p2 dude were revealed to ne brothers. It cuts to p1 dude in a hospital bed, he was severely injured due to police trying to stop him by shooting at him. P2 dude was there and he saids how much he loves p1 and how he was such an awesome brother to him. P1 is upset because he know once he heals he'll have to go to the mental hospital. P2 hears a voice telling him to kill p1 to end his suffering and he's better dead then being stuck

Postal Dude Reviews Documentary: Insights on Postal 3