Well, don't strain your brain.
3 seconds sound clip from the Blackbeard's Ghost (1968) movie soundboard.
You can hear this line at 01:22:15 in the Blu-ray version of the movie.
Quote context
[...]
- Well, where is Mr Walker, who's done so much for us?
- Well, I believe he's up in his room.
- But why go now? I mean, the lads have triumphed. The wager's won. Your wench is happy.
- There's enough money set aside for the old ladies.
- I fail to divine your reason for leaving.
- Well, don't strain your brain.
- In which case you may be able to settle down to a serene, albeit somewhat dull... life without me.
- Look, frizzface, you think I can stay around here after what happened out there tonight?
- What am I supposed to do for an encore?
- No, I'm bailing out. I've got to go somewhere I can make a fresh start... honestly, this time.
[...]