Marty: Whoa, rock and roll.

Just then a fire alarm goes off. Marty rummages through the pile of papers and finds a telephone - this is what was ringing, and the fire arm doubled as a ringtone. Marty answers the phone.

Marty: Yo.

Doc: (v.o) Marty, is that you?

Marty: Hey, hey, Doc, where are you?

Doc: (v.o) Thank god I found you. Listen, can you meet me at Twin Pines Mall tonight at 1.15? I've made a major breakthrough, I'll need your assistance.

Marty: Wait a minute, wait a minute. 1.15 in the morning?

Doc: (v.o) Yeah.

Marty: What's going on? Where have you been all week?

Doc: (v.o) Working.

Marty: Where's Einstein, is he with you?

Doc: (v.o) Yeah, he's right here.

Marty: You know, Doc, you left your equipment on all week.

Doc: (v.o) My equipment, that reminds me, Marty, you'd better not hook up to the amplifier. There's a slight possibility of overload.

Marty: Yeah, I'll keep that in mind.

Doc: (v.o) Good, I'll see you tonight. Don't forget, now, 1.15am., Twin Pines Mall.

Marty: Right.

The clocks all strike 8am.

Doc: (v.o) Are those my clocks I hear?

Marty: Yeah, it's 8 o'clock.

Doc: (v.o) They're late. My experiment worked. They're all exactly 25 minutes slow!

Marty: Wait a minute. Wait a minute, Doc. Are you telling me that it's 8.25?

Doc: (v.o) Precisely.

Marty: Damn. I'm late for school.

Marty hangs up, gets his stuff and gets on his skateboard.

Music: Power Of Love by Huey Lewis The News

He leaves Doc's lab and passes the Burger King next door, grabbing onto a tow-truck's behind and making sure he's not seen. The truck takes him into Courthouse Square, where he goes past Lou's Aerobics Studios and the Courthouse. The clock says 10.04.