Graham's Up the Tree! ("and there's nowhere else he can go!") - my 4 year old ran around the house for weeks misquoting the story with his own interpretation of an Australian accent. Calling it out over, and over, and over again.
That one time I thought it would be a good idea to coat my lips with black ink and kiss the paper. Regretted it for the next 3 hours walking about feeling like a goth.