I just couldn't believe it.

4 seconds sound clip from the In the Line of Fire movie soundboard.

You can hear this line at 01:42:45 in the Blu-ray version of the movie.

Quote context

[...]

- But Leary... He questioned whether I had the guts to take that fatal bullet.

- God, that was a beautiful day. The sun was out. Had been raining all morning. The air was...

- The first shot sounded like a firecracker.

- I looked over and saw him. I could tell he was hit.

- I don't know why I didn't react. I should have reacted. I should have been running flat-out.

- I just couldn't believe it.

- If only I reacted, I could have taken that shot. That would have been all right with me.

(Car passing)

- What's the number of that San Diego office?

- 619-Ukulele.

- 'Ukulele'?

- That's how I remember it. Seven numbers, seven letters. You just push u-k-e-I-e-I-e. Easy.

[...]