I don't understand:
1. how light can be both a wave and a particle (or packets of particles that move in wave ... whatever).
4. people's excitement over a phone. [Oh, wait, maybe I do understand this one ... it lets you "control everything with just your fingers." Whereas, previously, we had to use our toes to dial our fucking phones. It's a phone, people. It's not God in a Box.]
Feel free to add to my list in the comments ...