A brilliant blast from the brilliant past

Time for a joke from the vaults of the past. Not just any joke from the vaults of the past but a knock knock joke from vaults of the past. As you can imagine, this joke has passed the stringent test of time and lived to tell the tale. Some of you may remember this joke from when you were littler. Some of you may not have heard it at all. Some of you may think this is the best joke ever. Some of you may cringe in disbelief at how bad this actually is. Either way, I’m sure it will provoke a reaction and sure that’s all we want to do. I will now shut up or the tsunami of nonsense will just continue to flow. Feast your eyes on the daddy of knock knock jokes and begin the applause: