No! I must've gotten in there by mistake.

5 seconds sound clip from the TRON (1982) movie soundboard.

You can hear this line at 00:07:20 in the Blu-ray version of the movie.

Quote context

[...]

- Got a pirate program here.

- Says his name's Clu.

- What did he pull?

- He came into the system with a stolen password.

- We caught him trying to raid our high-clearance memory.

- No! I must've gotten in there by mistake.

- Who programmed you?

- I was simp...

- You're in trouble, program. Make it easy on yourself. Who's your User?

- Forget it, Mr. High And Mighty Master Control.

[...]