Source: Jimmy Kimmel Live (ABC, September 29, 2015)
Jimmy: That's funny. Has there ever been a situation where you didn't know your lines before?
Viola: There's been a situation where I have not known my lines, and there's been a (laughs)... the most prominent situation is when I was doing "Doubt" and Meryl Streep kept screwing up one line.
The structures of Jimmy's question and Viola's answer are very similar, yet they use different tenses in them. Which structure would be preferable in this context?