Dr. Emmett Brown: [Doc Brown is trying to read Marty's mind with a geodesic helmet and a suction cup] Erm, you want me to make a donation to the Coastguard Youth Auxilliary?
Marty McFly: Doc,
[pulls off suction cup]
Marty McFly: I'm from the future. I came here in a Time Machine that you invented. Now I need your help to get back to the year 1985.
Dr. Emmett Brown: My God. Do you know what this means?
[Significant pause]
Dr. Emmett Brown: It means that this damn thing doesn't work at all!
[Rips the helmet off]