So, watching Netflix last night, we were watching the A-X-L movie (not very good, but that's not the point). There is a SlingShot in the movie in 2 scenes.
Of course it's owned by the douche of the movie, and the "hero" and the "girl" get in it and talk for a little.
So, post here when you see SS's in movies. Try to get a screen capture (I got this from the YouTube trailer);