"Cultural" exchange

Nick: "How was your cultural exchange to Russia?"

Richard: "A lot of people got off with each other."

James: "Nothing about the city, or the architecture..."

So I studied something useful in University instead of Maths

Cez: "... and it doesn't make sense, until you realise that i is a completely imaginary number..."

James: "Yes, at some point the Sesame Street method of mathematics does begin to break down."