Apparently the whole affair with Nancy was a dream of Fonzie's. or was it? Why did they show Nancy's purse at the end?

i think it was all just a dream and the car was haunted

I thought that episode was silly and a clear indication that the writers were running out of ideas for Fonzie and the show.

Apparently the whole affair with Nancy was a dream of Fonzie's. or was it? Why did they show Nancy's purse at the end?
I think the reason they showed the purse at the end was to leave an element of doubt in viewers minds. Was it really a dream or could it have really happened?