you guys should practice in front of a mirror and say a few lines onto a recording machine and then play it back.
It's harder than you might think!
Try a little from a practice script (it's also harder to read somebody elses lines....)
INT. CESSNA SKYHAWK – DAY
(Front View)
Chuck and Julio are sitting in the cockpit, flying. Suddenly, Julio raises his eyebrows and looks over to Chuck because he caught a whiff of something and says:
JULIO
Hey, do you smell that? What is that?
Did somebody throw up in here recently?
Chuck turns to Julio.
CHUCK
What do you mean?
I can’t smell anything.
Julio ducks underneath the cockpit, you can only see the top of his head.
JULIO
Seriously dude!
Maybe some small animal died behind the panel or something.
I have to check it out!
CHUCK
(a little in despair)
I am sure it’s nothing.
But Chuck is catching on what Julio might be after.
CHUCK
(louder)
DON’T!!
JULIO
Oh!
Julio reappears from behind the panel and starts looking straight ahead. Chuck turns his head as well, knowing Julio found the source of the smell.
Awkward Silence. . . . (all you can hear is the engine sound)
Julio finally turns to Chuck who also has to face what comes next.
JULIO
Sorry, I didn’t mean to offend you or nothing.
CHUCK
What?
YOU never take off YOUR shoes during flight?