For me it would have to be the scene from National Lampoons Christmas Vacation where that white cat was chewing through the light cord for the tree and electrocutes itself under the chair.
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Originally posted by: Hardcore
Actually, this is a true story about my dog.
I have a Shih Tzu that's about 4 years old, and trained to go potty in a litterbox that has newspaper on the bottom (so all i need to do is toss the paper out when she goes). Anyways, one day i tossed the litterbox in the shower to clean it, and was letting it dry there, and forgot to take it back out. Well, apparently she had to go, and couldn't find the litterbox, so she was running around the house, sniffing everywhere. At first i thought she was just looking for a missing treat or something, until i saw her go on a pile of grocery flyers by my futon.