Say your pet rat dies. Instead of trashing it, you could shove LED throwie lights into its eye-sockets in a decorative taxidermy experiment that's as creative as it is graphically morbid. It might be what little Snowy would have wanted.
Seriously, wow. This is one of the most twisted step-by-step instructables yet. Personally, I don't have enough balls (or serial killer instinct) to gut my former pet, and stuff it with an LED assembly, wires and magnets. But as for any ethical dilemmas? If you were only going to throw it out anyway…
...Maybe you'd like to have your little pal hang around a little longer: [Instructables]