But if you are a Scottish lord, then I am Mickey Mouse!
7 seconds sound clip from the Indiana Jones and the Last Crusade movie soundboard.
You can hear this line at 00:46:01 in the Blu-ray version of the movie.
Quote context
[...]
- Do not take that tone with me, my good man.
- Dear me, the man is dense. This is a castle, isn't it? There are tapestries?
- This is a castle, and we have many tapestries.
- But if you are a Scottish lord, then I am Mickey Mouse!
- This one. I think he's in here.
- Don't worry. This is kid's play. I'll be right back.
[...]