Hello? Excuse me.

8 seconds sound clip from the Back to the Future movie soundboard.

You can hear this line at 00:32:45 in the Blu-ray version of the movie.

Quote context

[...]

- That ain't no airplane. Look.

(SCREAMING) (2)

- Children!

- Listen... Whoa.

(COWS MOOING)

- Hello? Excuse me.

- Sorry about your barn.

(GUN FIRING)

- It's already mutated into human form! Shoot it!

(GUN FIRE)

[...]