In the scene where Jan-Michael Vincent is returning to the base after the nuclear winter, he's seen with a girl on the back of his motorcycle. When he goes to push her off, it's a REAL woman, yet when his partner looks back for her through his telescope, it's a dummy.

He says after the scene that he brought the dummy all the way back from Barstow/Vegas and he must be starting to crack up, so I know it was supposed to be a dummy, and not a real woman.