this reminds me of..
that 60's propaganda video about LSD
there was a girl who did some acid after smoking some marijuana at a party and she and her boyfriend went out to get hotdogs
when they got the dogs, the girl heard this screaming sound and something saying don't eat me, don't eat me!
next thing you know, they replace the dog with one of those troll dolls cut in half cause the girl took a bite from it
she ran down the street, screaming.. whew, long review, funny though