This gas is rising. Lighter than air. We'll have a few more life-saving seconds.
10 seconds sound clip from Batman (1966) - A Death Worse Than Fate (S1E10) TV Series.
You can hear this line at 00:20:03 in the Blu-ray version of the movie.
Quote context
[...]
- Now... Look down at your feet.
- A deadly, colored gas is issuing.
- Quick, let's get that grill... Electrified.
- Holy graveyard, Batman. This could be... curtains.
- Don't quit, Robin. Let's get our heads down.
- This gas is rising. Lighter than air. We'll have a few more life-saving seconds.
- Hey, a gas lighter than air?
- Must have... hydrogen in it.
- We can. High voltage grill. Metal buckles of our belts.
- Give me your utility belt and step back, Robin.
[...]