Doc, it is Biff's house. I'm on him. Over.
5 seconds sound clip from the Back to the Future Part II movie soundboard.
You can hear this line at 01:04:50.336 in the Blu-ray version of the movie.
Quote context
[...]
- I'm going to get my car, Grandma.
- When are you coming back? My feet hurt, and I want you to rub my toes some more.
- What ball are you talking about?
- Yeah!
- Is it your ball? You want it back?
- Yeah.
- Doc, it is Biff's house. I'm on him. Over.
- Hey, Biff, she's all fixed up just like new, but I couldn't get her started.
- You got some kind of kill switch on this thing?
- No, you just gotta have the right touch. Nobody can start this car but me.
- Yeah, the bill comes to $302.57.
- 300 bucks for a couple of dents? No, hey, that's bullshit, Terry.
[...]