The Big Bang Theory2007

Leonard Hofstadter:
[Walking by Sheldon's office door] My God, what is that smell? [Knocks on the door-Sheldon emerges wearing a gasmask]

Sheldon Cooper:
Yes?

Leonard Hofstadter:
What are you doing in there?

Sheldon Cooper:
I'm making hydrogen sulfide and ammonia gas. Just a little experiment in pest control.

Raj Koothrappali:
[Raj emerges from the office] That's not gonna work, dude, I grew up in India: an entire sub-continent where cows walk in the street and nobody has ever had a solid bowel movement.

Sheldon Cooper:
Well, we'll just see how long you can hold out.

Raj Koothrappali:
Well, we'll just see how you noxious gas fares against my cinnamon-apple scented aromatherapy candles. [Retreats into the office. Sheldon turns to Leonard and shakes his head]

Leonard Hofstadter:
Didn't you saw you're making hydrogen sulfide gas?

Sheldon Cooper:
Yes.

Leonard Hofstadter:
Isn't that flammable?

Sheldon Cooper:
Highly. [Leonard looks at him with raised eyebrows] Oh, dear.

Raj Koothrappali:
[There is a flash and a bang from inside the office. Leonard and Sheldon step back quickly. Raj emerges blackened and dishevelled with a parakeet in a cage] This is not over.