I know we're not really talking about Glee anymore, but I was surprised when they did a mash-up of Danger Zone and Old Time Rock n Roll on this week's episode and it kind of worked for me. I did wish they didn't pick movies from before the 90s, but it wasn't bad. It's just when I think mash-up, Danger Zone and OTRNR don't really fit together that well.
Other than the Flashdance number being tacked on in the end, I liked this episode. It would have been even better had they ended it with Will walking away from Finn though.