During the Credits
There are extra pictures of Keanu the cat parodying various characters from other movies along with the characters and their respective actors during the credits of Keanu.
After the Credits
There is a stinger after the credits of Keanu.
In the extra scene, the Allentown Brothers are shown sitting up after being presumably dead. They get up and drive off into the night.
Special thanks to Matthew Lowery, Chris J, and Nick for the stinger submissions!