Easter Bunnium
Wikisimpsons - The Simpsons Wiki
Easter Bunnium was a substance that Professor Frink invented and experimented with on Easter.
History
After Frink's experimentation with Frinkium Nitrate delayed the onset of winter in Springfield, he swore that he would "never again meddle in the dangerous realm of holiday silence". However, Frink broke his own oath on the following Easter, four months later, when he conducted an experiment with Easter Bunnium. The experiment failed horribly, resulting in Professor Frink and the Simpson family being chased by gigantic Easter bunnies.
