// Introducing problem with two bikers colliding
Schafer: So you might think ... that with 20 miles between them, they could figure out how to not hit each other.
Schafer: But you haven't met my children, who, with an *infinite* distance between them, would still hit each other.
// Schafer showing video of him playing/physics-demonstrating on a blue carpet
Schafer: You may think this is a blue carpet... but this is actually a river. And you can tell it's a river because it's blue.
Schafer: Yes, [Student], laugh. It's a joke; it's funny.