Cuffi Advert
The Cuffi adverts are a series of screamer videos that claim to be inspired by the K-fee Commercials. They are from VenerableDread, maker of such screamers like Saddam Hussein Execution. They were released in late 2006.
Each video ends with a parody of K-fee's slogan, along with the Internet's ending variation: "Now go change your pants."
Advert 1
A view of the sunset is shown from the side of the road is displayed for 9 seconds. After this, what looks like an inverted cartoon robot appears with a guy screaming "BOOOO!" (happens to be the same sound from What's Wrong?).
Advert 2
A view of a motorway with a bunch of cars driving around is shown. Again, at 9 seconds, a screamer appears, this time a green-scaled image of a deformed face with the same scream as before.
Links
https://www.youtube.com/watch?v=zyg-QjtBteU
https://www.youtube.com/watch?v=INWH0AMQzvk&index=8&list=PLs1BtYXZ8_8PwcLehwDMGGGRTOJp4HuCQ