Don't do anything.
2 seconds sound clip from the It Came from Outer Space movie soundboard.
You can hear this line at 01:06:10.637 in the Blu-ray version of the movie.
Quote context
[...]
- You keep throwing these questions at me. All I can do is guess.
- Now your clothes, too. Could be any one of them.
- Stop working yourself up, Matt. It's hot enough without raising your blood pressure.
- Yeah.
- Look at him. Walking around like he belongs here.
- The sooner they finish, the sooner they'll clear out.
- How do we know they're really walking around in our clothes or Frank's, or George's, or Ellen's?
- We've come this far, we've got to see it through.
- What do you mean, see it through?
- How do we know they're not taking over? They could be all around us and I wouldn't know it.
[...]