This is going to be really vague, but there was a movie that I used to watch back in the 80's about these 2 kids that were trying to elope. The girl's dad didn't think that the boy she liked was good enough for her so he tried to chase them down. I don't really remember a whole lot about the movie, but one scene I remember is the kids are running towards a cliff, then a helicopter comes up from behind the cliff, then they jump off the cliff into some water below.

Fire with Fire (1986) (http://en.wikipedia.org/wiki/Fire_with_Fire)

Yeah, I think that's it. Thanks.