what is Woody Allen's hilariously deadpan response to Chris Walken in "Annie Hall"??

It’s been driving me nuts for a few days, and I just packed up my DVD copy for moving. In “Annie Hall”, Christopher Walken has a killer cameo as Annie’s deranged brother. After Walken does a hilariously existential and bizarre soliloquy about wanting to suddenly drive off of the road while driving, Woody comes back with a hilariously understarted response.

Does anyone know/remember what it is?

Seen it often enough, so this should be near if not verbatim:

‘I need to go now, Duane, because I’m due back on planet Earth’

That’s it! :slight_smile:

Nitpick: Not just “off the road”.

From IMDB:

And of course, Duane is elected to drive Alvy and Annie to the airport. In the rain, no less.