- It's a gas, man.
- Yeah. Specifically, helium.

4 seconds sound clip from the The Brave Little Toaster (1987) movie soundboard.

You can hear this line at 00:31:08.210 in the Blu-ray version of the movie.

Quote context

[...]

- Ah! Aliens approaching on the starboard side! No! The starboard side!

- Which side is starboard on a laundry basket?

- This side.

- That's just a bunch of balloons.

- Howdy, partner. Where y'all heading?

- Mars.

- Ha! You pulling my string.

- No, we aren't. We're way over here and you're way over there.

- Hey, didn't we meet at the electronics pavilion, Century of Progress, New York, May of '39?

- I don't think so.

- What are you all doing up here?

- We're just hanging. Hanging and floating.

- It's a gas, man.

- Yeah. Specifically, helium.

- We're floating, west and east we go floating, free and released from their hands that gave us light. Hands too little to hold on tight, now we float forever in and out of sight.

- It wasn't so much the music or the rain that started to fall. The miracle part of Woodstock was that peace could happen at all. Peace could happen at all.

- Heard they tried again, but me and my string feel you can't relive a one-time thing.

- So we're floating, floating south and north. We go floating, floating backwards and forth 'cause of hands that gave us fight, hands too little to hold on tight. Now we float forever in and out of sight.

[...]