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Rachel: Help, somebody.
Gotcha.

Clark: Did you ever consider a career in acting? Why asking her that when in
the beginning of the episode they described her as a big movie star?

Rachel: l wanted to say goodbye.
But don't worry, l'll be back for the sequel.

What's this?

Rachel: Thanks for showing me Smallville
had more to offer than a tax break.
lt's a little something from the movie.
Every superhero needs one.
l signed onto Warrior Angel for publicity and a paycheck.

But after meeting you l'm starting to believe
that heroes really do exist.
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MadhulkClark: Did you ever consider a career in acting? Why asking her that when in
the beginning of the episode they described her as a big movie star?
Assuming Clark knows that she's a movie star he is probably making a joke. Your quote doesn't provide enough context to say much more that that.
In fact the context may be in the way he says it or in the situation as opposed to it strictly being in the dialog.
Comments  
Thanks, Ray!