What games can you speedrun?

[metagloria]

I've also beaten Super Mario World in 17 minutes, which I think has to be pretty close to a record since I took the shortest possible path and didn't die.

What games can you sit down, pop in, and blast through in a matter of minutes/hours?

Apparently the world record is <10 minutes. This guy has a video for 10:15.

Yeah, I looked this up a few days after posting this. 9:51? Good gracious. How even. Reminds me of when I used to be "really good" at minesweeper (Expert in 89 seconds!), except the world record is like 40.