This is the craziest thing you've ever done. Chuck, you must be completely crazy.
7 seconds sound clip from the It's Arbor Day, Charlie Brown movie soundboard.
You can hear this line at 00:17:20.149 in the DVD version of the movie.
Quote context
[...]
- Hey, Chuck, here we are. We don't wanna delay the game, Chuck. Let's get to it.
- Hey, what's all this? You starting a victory garden, Chuck?
- You've got everything here but sheep and cattle, Charlie Brown.
- Well, my team thought it would be nice, on account of Arbor Day, to...
- Chuck, are you mad? What's going on here? This is your ball field?
- They even wanna name the field after me: Charlie Brown Field.
- This is the craziest thing you've ever done. Chuck, you must be completely crazy.
- You have to be the most dumb manager that ever lived.
- How can I pitch from this crazy mound with a tree on it? Well, we'll have to make the best of it.
- We'll still clobber you, Chuck. Your team can bat first.
[...]