Corrected entry: When Doc and Marty are in Doc's house in the alternate 1985, Doc sets up Einstein's doggie bed and the dog jumps in. From one angle he starts to turn around to his right, but in the reverse shot he turns to his left.
Krista
25th Jun 2004
Correction: Have a look next time you see a dog doing this - the circle rapidly one way, then reverse, then reverse again, and finally settle down. That's exactly what Einstein is doing.