According to the DVD documentary, Lynch did conceive it as and have helium on the set, but Dennis Hopper didn't like how it made his voice sound. So Hopper suggested to Lynch that he always thought of it as amyl nitrate or nitric oxide.
Perfect for when you wanna "fuck anything that moves!"
Did you or anybody ever catch the SNL parody of Blue Velvet?
It was a TV show called Frank Booth's: What's that Smell?
Absulutely hilarious, Dennis was (obviously) the host, and the three contestants were suposed to guess the smell of something, Hopper had the mask, his tank and the black leather jacket, he was always yelling at everybody, when he aproached the contestants right by the end to shake hands or something he yelled at them Don't you look at me!!! Don't you frigging look at me!!! even when the anouncer said 'see you next week' he stared at the camera and again yelled Don't you look at me!!!