I don't know. Let's go find out.
5 seconds sound clip from the Bill & Ted's Excellent Adventure movie soundboard.
You can hear this line at 00:54:03 in the Blu-ray version of the movie.
Quote context
[...]
- Hey! That's us. We're back in San Dimas.
- Yeah, only now it's not now. It's last night.
- Dude. Let's go talk to ourselves.
- What do we say anyway, anyways?
- I don't know. Let's go find out.
- Rufus!
- Listen to this dude Rufus, he knows what he's talking about.
[...]