Existential Moment

My existential moment is whenever I watch Horton Hears a Who. It makes me wonder if our whole existence is just a speck in the lives of someone else. Is there something bigger than our existence? It makes me wonder if there is an unbelievably large spectrum of unknown in our daily lives, that we have no idea about and no way to figure out. What if there is more universe beyond our solar system, and it just keeps going on forever? Does existence go on forever in all different directions?