Fing-longer

The Fing-Longer is a glove which has an extended index finger. Professor Farnsworth had always dreamed of inventing the Fing-Longer, and used the What-If Machine to ponder what might have happened had he, in fact, invented it.

Later, he actually invented it in reality.

Trivia

 * It was later discovered by the Simpsons in a crossover.