I had a cat who once bit into a Glow-Stick and got a mouthful of the inside stuff. It gave us a huge shock because the first we knew of it was the cat racing around the apartment like a maniac, foaming from the mouth!
My husband was convinced the cat was going to die on the spot, and blaming me because they were my glow sticks. I picked up the package, looked at it, and said, "But it says non-toxic!" Then I called the vet and he confirmed that indeed - Glow Sticks are non-toxic. Phew!
Apparently ALL cats will freak out and foam if they get a mouthful of mineral oil.

Once we knew she wasn't dying, we turned off the lights and enjoyed our glow-in-the-dark cat.
So you'd think that would have taught my husband something about jumping to dire conclusions, but no... we went through the whole scenario again when the dog ate a Lindt chocolate. He'd heard that chocolate is poisonous for dogs, so he was convinced the dog was dead. A goner. That time I ended up printing out a whole bunch of info from the computer describing exactly how much chocolate a dog has to eat before it shows ill effects, based on purity of the chocolate and size of the dog. Our dog didn't even get a tummy ache.
I swear, our animals are out to give us all gray hair!