This comic comes from the always entertaining Doghouse Diaries.
The first phenomenon is generally referred to as semantic satiation, where you say the word so many times you begin to separate the word from its meaning. At the start of the 20th century Ferdinand de Saussure began what is now known as a structural approach to language, and started looking at words as an arbitrary combination of sounds (e.g. d-o-g) and meaning (domestic canine). Creating semantic satiation, you’re basically putting his ideas into practice!
I’M REALLY HAPPY BECAUSE THIS PLAYS OFF THE AMBIGUITY OF “SAY IT OVER AND OVER AGAIN” BECAUSE THAT HAS AMBIGUOUS ASPECT WHICH CAN TAKE PLACE OVER VARIOUS LENGTHS OF TIME